Rhonda numbers: Difference between revisions

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;* [[oeis:A255732|OEIS:A255732 - Rhonda numbers in vigesimal number system]] (base 20)
;* [[oeis:A255732|OEIS:A255732 - Rhonda numbers in vigesimal number system]] (base 20)
;* [[oeis:A255736|OEIS:A255736 - Integers that are Rhonda numbers to base 30]]
;* [[oeis:A255736|OEIS:A255736 - Integers that are Rhonda numbers to base 30]]

;* [[Smith numbers|Related Task: Smith numbers]]
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Revision as of 12:27, 10 February 2022

Rhonda numbers is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

A positive integer n is said to be a Rhonda number to base b if the product of the base b digits of n is equal to b times the sum of n's prime factors.


These numbers were named by Kevin Brown after an acquaintance of his whose residence number was 25662, a member of the base 10 numbers with this property.


25662 is a Rhonda number to base-10. The prime factorization is 2 × 3 × 7 × 13 × 47; the product of its base-10 digits is equal to the base times the sum of its prime factors:

2 × 5 × 6 × 6 × 2 = 720 = 10 × (2 + 3 + 7 + 13 + 47)

Rhonda numbers only exist in bases that are not a prime.

Rhonda numbers to base 10 always contain at least 1 digit 5 and always contain at least 1 even digit.


Task
  • For the non-prime bases b from 2 through 16 , find and display here, on this page, at least the first 10 Rhonda numbers to base b. Display the found numbers at least in base 10.


Stretch
  • Extend out to base 36.


See also



Julia

<lang julia>using Primes

isRhonda(n, b) = prod(digits(n, base=b)) == b * sum([prod(pair) for pair in factor(n).pe])

function displayrhondas(low, high, nshow)

   for b in filter(!isprime, low:high)
       n, rhondas = 1, Int[]
       while length(rhondas) < nshow
           isRhonda(n, b) && push!(rhondas, n)
           n += 1
       end
       println("First $nshow Rhondas in base $b:")
       println("In base 10: ", rhondas)
       println("In base $b: ", replace(string([string(i, base=b) for i in rhondas]), "\"" => ""), "\n")
   end

end

displayrhondas(2, 16, 15)

</lang>

Output:
First 15 Rhondas in base 4:
In base 10: [10206, 11935, 12150, 16031, 45030, 94185, 113022, 114415, 191149, 244713, 259753, 374782, 392121, 503773, 649902]
In base 4: [2133132, 2322133, 2331312, 3322133, 22333212, 112333221, 123211332, 123323233, 232222231, 323233221, 333122221, 1123133332, 1133232321, 1322333131, 2132222232]

First 15 Rhondas in base 6:
In base 10: [855, 1029, 3813, 5577, 7040, 7304, 15104, 19136, 35350, 36992, 41031, 42009, 60368, 65536, 67821]
In base 6: [3543, 4433, 25353, 41453, 52332, 53452, 153532, 224332, 431354, 443132, 513543, 522253, 1143252, 1223224, 1241553]

First 15 Rhondas in base 8:
In base 10: [1836, 6318, 6622, 10530, 14500, 14739, 17655, 18550, 25398, 25956, 30562, 39215, 39325, 50875, 51429]
In base 8: [3454, 14256, 14736, 24442, 34244, 34623, 42367, 44166, 61466, 62544, 73542, 114457, 114635, 143273, 144345]

First 15 Rhondas in base 9:
In base 10: [15540, 21054, 25331, 44360, 44660, 44733, 47652, 50560, 54944, 76857, 77142, 83334, 83694, 96448, 97944]
In base 9: [23276, 31783, 37665, 66758, 67232, 67323, 72326, 76317, 83328, 126376, 126733, 136273, 136723, 156264, 158316]

First 15 Rhondas in base 10:
In base 10: [1568, 2835, 4752, 5265, 5439, 5664, 5824, 5832, 8526, 12985, 15625, 15698, 19435, 25284, 25662]
In base 10: [1568, 2835, 4752, 5265, 5439, 5664, 5824, 5832, 8526, 12985, 15625, 15698, 19435, 25284, 25662]

First 15 Rhondas in base 12:
In base 10: [560, 800, 3993, 4425, 4602, 4888, 7315, 8296, 9315, 11849, 12028, 13034, 14828, 15052, 16264]
In base 12: [3a8, 568, 2389, 2689, 27b6, 29b4, 4297, 4974, 5483, 6a35, 6b64, 7662, 86b8, 8864, 94b4]

First 15 Rhondas in base 14:
In base 10: [11475, 18655, 20565, 29631, 31725, 45387, 58404, 58667, 59950, 63945, 67525, 68904, 91245, 99603, 125543]
In base 14: [4279, 6b27, 76cd, ab27, b7c1, 1277d, 173da, 17547, 17bc2, 19437, 1a873, 1b17a, 25377, 28427, 33a75]

First 15 Rhondas in base 15:
In base 10: [2392, 2472, 11468, 15873, 17424, 18126, 19152, 20079, 24388, 30758, 31150, 33004, 33550, 37925, 39483]
In base 15: [a97, aec, 35e8, 4a83, 5269, 5586, 5a1c, 5e39, 735d, 91a8, 936a, 9ba4, 9e1a, b385, ba73]

First 15 Rhondas in base 16:
In base 10: [1000, 1134, 6776, 15912, 19624, 20043, 20355, 23946, 26296, 29070, 31906, 32292, 34236, 34521, 36465]
In base 16: [3e8, 46e, 1a78, 3e28, 4ca8, 4e4b, 4f83, 5d8a, 66b8, 718e, 7ca2, 7e24, 85bc, 86d9, 8e71]


Raku

Find and show the first 15 so as to display the namesake Rhonda number 25662. <lang perl6>use Prime::Factor;

my @factor-sum;

@factor-sum[1000000] = 42; # Sink a large index to make access thread safe

sub rhonda ($base) {

   (1..∞).hyper.map: { $_ if $base * (@factor-sum[$_] //= .&prime-factors.sum) == [×] .polymod($base xx *) }

}

for (flat 2..16, 17..36).grep: { !.&is-prime } -> $b {

   put "\nFirst 15 Rhonda numbers to base $b:";
   my @rhonda = rhonda($b)[^15];
   my $ch = @rhonda[*-1].chars max @rhonda[*-1].base($b).chars;
   put "In base 10: " ~ @rhonda».fmt("%{$ch}s").join: ', ';
   put $b.fmt("In base %2d: ") ~ @rhonda».base($b)».fmt("%{$ch}s").join: ', ';

}</lang>

Output:
First 15 Rhonda numbers to base 4:
In base 10:      10206,      11935,      12150,      16031,      45030,      94185,     113022,     114415,     191149,     244713,     259753,     374782,     392121,     503773,     649902
In base  4:    2133132,    2322133,    2331312,    3322133,   22333212,  112333221,  123211332,  123323233,  232222231,  323233221,  333122221, 1123133332, 1133232321, 1322333131, 2132222232

First 15 Rhonda numbers to base 6:
In base 10:     855,    1029,    3813,    5577,    7040,    7304,   15104,   19136,   35350,   36992,   41031,   42009,   60368,   65536,   67821
In base  6:    3543,    4433,   25353,   41453,   52332,   53452,  153532,  224332,  431354,  443132,  513543,  522253, 1143252, 1223224, 1241553

First 15 Rhonda numbers to base 8:
In base 10:   1836,   6318,   6622,  10530,  14500,  14739,  17655,  18550,  25398,  25956,  30562,  39215,  39325,  50875,  51429
In base  8:   3454,  14256,  14736,  24442,  34244,  34623,  42367,  44166,  61466,  62544,  73542, 114457, 114635, 143273, 144345

First 15 Rhonda numbers to base 9:
In base 10:  15540,  21054,  25331,  44360,  44660,  44733,  47652,  50560,  54944,  76857,  77142,  83334,  83694,  96448,  97944
In base  9:  23276,  31783,  37665,  66758,  67232,  67323,  72326,  76317,  83328, 126376, 126733, 136273, 136723, 156264, 158316

First 15 Rhonda numbers to base 10:
In base 10:  1568,  2835,  4752,  5265,  5439,  5664,  5824,  5832,  8526, 12985, 15625, 15698, 19435, 25284, 25662
In base 10:  1568,  2835,  4752,  5265,  5439,  5664,  5824,  5832,  8526, 12985, 15625, 15698, 19435, 25284, 25662

First 15 Rhonda numbers to base 12:
In base 10:   560,   800,  3993,  4425,  4602,  4888,  7315,  8296,  9315, 11849, 12028, 13034, 14828, 15052, 16264
In base 12:   3A8,   568,  2389,  2689,  27B6,  29B4,  4297,  4974,  5483,  6A35,  6B64,  7662,  86B8,  8864,  94B4

First 15 Rhonda numbers to base 14:
In base 10:  11475,  18655,  20565,  29631,  31725,  45387,  58404,  58667,  59950,  63945,  67525,  68904,  91245,  99603, 125543
In base 14:   4279,   6B27,   76CD,   AB27,   B7C1,  1277D,  173DA,  17547,  17BC2,  19437,  1A873,  1B17A,  25377,  28427,  33A75

First 15 Rhonda numbers to base 15:
In base 10:  2392,  2472, 11468, 15873, 17424, 18126, 19152, 20079, 24388, 30758, 31150, 33004, 33550, 37925, 39483
In base 15:   A97,   AEC,  35E8,  4A83,  5269,  5586,  5A1C,  5E39,  735D,  91A8,  936A,  9BA4,  9E1A,  B385,  BA73

First 15 Rhonda numbers to base 16:
In base 10:  1000,  1134,  6776, 15912, 19624, 20043, 20355, 23946, 26296, 29070, 31906, 32292, 34236, 34521, 36465
In base 16:   3E8,   46E,  1A78,  3E28,  4CA8,  4E4B,  4F83,  5D8A,  66B8,  718E,  7CA2,  7E24,  85BC,  86D9,  8E71

First 15 Rhonda numbers to base 18:
In base 10:  1470,  3000,  8918, 17025, 19402, 20650, 21120, 22156, 26522, 36549, 38354, 43281, 46035, 48768, 54229
In base 18:   49C,   94C,  1998,  2G9F,  35FG,  39D4,  3B36,  3E6G,  49F8,  64E9,  6A6E,  77A9,  7G19,  8696,  956D

First 15 Rhonda numbers to base 20:
In base 10:  1815, 11050, 15295, 21165, 22165, 30702, 34510, 34645, 42292, 44165, 52059, 53416, 65945, 78430, 80712
In base 20:   4AF,  17CA,  1I4F,  2CI5,  2F85,  3GF2,  465A,  46C5,  55EC,  5A85,  6A2J,  6DAG,  84H5,  9G1A,  A1FC

First 15 Rhonda numbers to base 21:
In base 10:  1632,  5390,  8512, 12992, 15678, 25038, 29412, 34017, 39552, 48895, 49147, 61376, 85078, 89590, 91798
In base 21:   3EF,   C4E,   J67,  189E,  1EBC,  2EG6,  33EC,  3E2I,  45E9,  55I7,  5697,  6D3E,  93J7,  9E34,  9J37

First 15 Rhonda numbers to base 22:
In base 10:   2695,   4128,   7865,  28800,  31710,  37030,  71875,  74306, 117760, 117895, 121626, 126002, 131427, 175065, 192753
In base 22:    5CB,    8BE,    G5B,   2FB2,   2LB8,   3AB4,   6GB1,   6LBC,   B16G,   B1CJ,   B96A,   BI78,   C7BL,   G9FB,   I25B

First 15 Rhonda numbers to base 24:
In base 10:  2080,  2709,  3976,  5628,  5656,  7144,  8296,  9030, 10094, 17612, 20559, 24616, 26224, 29106, 31458
In base 24:   3EG,   4GL,   6LG,   9IC,   9JG,   C9G,   E9G,   FG6,   HCE,  16DK,  1BGF,  1IHG,  1LCG,  22CI,  26EI

First 15 Rhonda numbers to base 25:
In base 10:   6764,   9633,  13260,  22022,  53382,  57640,  66015,  69006,  97014, 140130, 142880, 144235, 159724, 162565, 165504
In base 25:    AKE,    FA8,    L5A,   1A5M,   3AA7,   3H5F,   45FF,   4AA6,   655E,   8O55,   93F5,   95JA,   A5DO,   AA2F,   AEK4

First 15 Rhonda numbers to base 26:
In base 10:   7788,   9322,   9374,  11160,  22165,  27885,  34905,  44785,  47385,  49257,  62517,  72709,  74217, 108745, 132302
In base 26:    BDE,    DKE,    DME,    GD6,   16KD,   1F6D,   1PGD,   2E6D,   2I2D,   2KMD,   3ECD,   43ED,   45KD,   64MD,   7DIE

First 15 Rhonda numbers to base 27:
In base 10:  4797, 11844, 12078, 13200, 14841, 17750, 24320, 26883, 27477, 46455, 52750, 58581, 61009, 61446, 61500
In base 27:   6FI,   G6I,   GF9,   I2O,   K9I,   O9B,  169K,  19NI,  1AII,  29JF,  2I9J,  2Q9I,  32IG,  337L,  339L

First 15 Rhonda numbers to base 28:
In base 10:  3094,  5808,  5832,  7462, 11160, 13671, 27270, 28194, 28638, 39375, 39550, 49500, 50862, 52338, 52938
In base 28:   3QE,   7BC,   7C8,   9EE,   E6G,   HC7,  16LQ,  17QQ,  18EM,  1M67,  1MCE,  273O,  28OE,  2AL6,  2BEI

First 15 Rhonda numbers to base 30:
In base 10:  3024,  3168,  5115,  5346,  5950,  6762,  7750,  7956,  8470,  9476,  9576,  9849, 10360, 11495, 13035
In base 30:   3AO,   3FI,   5KF,   5S6,   6IA,   7FC,   8IA,   8P6,   9CA,   AFQ,   AJ6,   AS9,   BFA,   CN5,   EEF

First 15 Rhonda numbers to base 32:
In base 10:  1944,  3600, 13520, 15876, 16732, 16849, 25410, 25752, 28951, 47472, 49610, 50968, 61596, 64904, 74005
In base 32:   1SO,   3GG,   D6G,   FG4,   GAS,   GEH,   OQ2,   P4O,   S8N,  1EBG,  1GEA,  1HOO,  1S4S,  1VC8,  288L

First 15 Rhonda numbers to base 33:
In base 10:    756,   7040,   7568,  13826,  24930,  30613,  59345,  63555,  64372, 131427, 227840, 264044, 313709, 336385, 344858
In base 33:     MU,    6FB,    6VB,    CMW,    MTF,    S3M,   1LGB,   1PBU,   1Q3M,   3LML,   6B78,   7BFB,   8O2B,   9BTG,   9JM8

First 15 Rhonda numbers to base 34:
In base 10:   5661,  14161,  15620,  16473,  22185,  37145, 125579, 134692, 135405, 138472, 140369, 177086, 250665, 255552, 295614
In base 34:    4UH,    C8H,    DHE,    E8H,    J6H,    W4H,   36LH,   3EHI,   3F4H,   3HQO,   3JEH,   4H6E,   6CSH,   6H28,   7HOI

First 15 Rhonda numbers to base 35:
In base 10:   8232,   9476,   9633,  18634,  30954,  41905,  52215,  52440,  56889,  61992,  62146,  66339,  98260, 102180, 103305
In base 35:    6P7,    7PQ,    7U8,    F7E,    P9E,    Y7A,   17LU,   17SA,   1BFE,   1FL7,   1FPL,   1J5E,   2A7F,   2DEF,   2EBK

First 15 Rhonda numbers to base 36:
In base 10:  1000,  4800,  5670,  8190, 10998, 12412, 13300, 15750, 16821, 23016, 51612, 52734, 67744, 70929, 75030
In base 36:    RS,   3PC,   4DI,   6BI,   8HI,   9KS,   A9G,   C5I,   CZ9,   HRC,  13TO,  14OU,  1G9S,  1IQ9,  1LW6

Wren

Library: Wren-math
Library: Wren-fmt

<lang ecmascript>import "./math" for Math, Int, Nums import "./fmt" for Fmt, Conv

for (b in 2..36) {

   if (Int.isPrime(b)) continue
   var count = 0
   var rhonda = []
   var n = 1
   while (count < 15) {
       var digits = Int.digits(n, b)
       if (!digits.contains(0)) {
           if (b != 10 || (digits.contains(5) && digits.any { |d| d % 2 == 0 })) {
               var calc1 = Nums.prod(digits)
               var calc2 = b * Nums.sum(Int.primeFactors(n))
               if (calc1 == calc2) {
                   rhonda.add(n)
                   count = count + 1
               }
           }
       }
       n = n + 1
   }
   if (rhonda.count > 0) {
       System.print("\nFirst 15 Rhonda numbers in base %(b):")
       var rhonda2 = rhonda.map { |r| r.toString }.toList
       var rhonda3 = rhonda.map { |r| Conv.Itoa(r, b) }.toList
       var maxLen2 = Nums.max(rhonda2.map { |r| r.count })
       var maxLen3 = Nums.max(rhonda3.map { |r| r.count })
       var maxLen  = Math.max(maxLen2, maxLen3) + 1
       Fmt.print("In base 10:  $*s", maxLen, rhonda2)
       Fmt.print("In base $-2d:  $*s", b, maxLen, rhonda3)
   }

}</lang>

Output:
First 15 Rhonda numbers in base 4:
In base 10:        10206       11935       12150       16031       45030       94185      113022      114415      191149      244713      259753      374782      392121      503773      649902
In base 4 :      2133132     2322133     2331312     3322133    22333212   112333221   123211332   123323233   232222231   323233221   333122221  1123133332  1133232321  1322333131  2132222232

First 15 Rhonda numbers in base 6:
In base 10:       855     1029     3813     5577     7040     7304    15104    19136    35350    36992    41031    42009    60368    65536    67821
In base 6 :      3543     4433    25353    41453    52332    53452   153532   224332   431354   443132   513543   522253  1143252  1223224  1241553

First 15 Rhonda numbers in base 8:
In base 10:     1836    6318    6622   10530   14500   14739   17655   18550   25398   25956   30562   39215   39325   50875   51429
In base 8 :     3454   14256   14736   24442   34244   34623   42367   44166   61466   62544   73542  114457  114635  143273  144345

First 15 Rhonda numbers in base 9:
In base 10:    15540   21054   25331   44360   44660   44733   47652   50560   54944   76857   77142   83334   83694   96448   97944
In base 9 :    23276   31783   37665   66758   67232   67323   72326   76317   83328  126376  126733  136273  136723  156264  158316

First 15 Rhonda numbers in base 10:
In base 10:    1568   2835   4752   5265   5439   5664   5824   5832   8526  12985  15625  15698  19435  25284  25662
In base 10:    1568   2835   4752   5265   5439   5664   5824   5832   8526  12985  15625  15698  19435  25284  25662

First 15 Rhonda numbers in base 12:
In base 10:     560    800   3993   4425   4602   4888   7315   8296   9315  11849  12028  13034  14828  15052  16264
In base 12:     3A8    568   2389   2689   27B6   29B4   4297   4974   5483   6A35   6B64   7662   86B8   8864   94B4

First 15 Rhonda numbers in base 14:
In base 10:    11475   18655   20565   29631   31725   45387   58404   58667   59950   63945   67525   68904   91245   99603  125543
In base 14:     4279    6B27    76CD    AB27    B7C1   1277D   173DA   17547   17BC2   19437   1A873   1B17A   25377   28427   33A75

First 15 Rhonda numbers in base 15:
In base 10:    2392   2472  11468  15873  17424  18126  19152  20079  24388  30758  31150  33004  33550  37925  39483
In base 15:     A97    AEC   35E8   4A83   5269   5586   5A1C   5E39   735D   91A8   936A   9BA4   9E1A   B385   BA73

First 15 Rhonda numbers in base 16:
In base 10:    1000   1134   6776  15912  19624  20043  20355  23946  26296  29070  31906  32292  34236  34521  36465
In base 16:     3E8    46E   1A78   3E28   4CA8   4E4B   4F83   5D8A   66B8   718E   7CA2   7E24   85BC   86D9   8E71

First 15 Rhonda numbers in base 18:
In base 10:    1470   3000   8918  17025  19402  20650  21120  22156  26522  36549  38354  43281  46035  48768  54229
In base 18:     49C    94C   1998   2G9F   35FG   39D4   3B36   3E6G   49F8   64E9   6A6E   77A9   7G19   8696   956D

First 15 Rhonda numbers in base 20:
In base 10:    1815  11050  15295  21165  22165  30702  34510  34645  42292  44165  52059  53416  65945  78430  80712
In base 20:     4AF   17CA   1I4F   2CI5   2F85   3GF2   465A   46C5   55EC   5A85   6A2J   6DAG   84H5   9G1A   A1FC

First 15 Rhonda numbers in base 21:
In base 10:    1632   5390   8512  12992  15678  25038  29412  34017  39552  48895  49147  61376  85078  89590  91798
In base 21:     3EF    C4E    J67   189E   1EBC   2EG6   33EC   3E2I   45E9   55I7   5697   6D3E   93J7   9E34   9J37

First 15 Rhonda numbers in base 22:
In base 10:     2695    4128    7865   28800   31710   37030   71875   74306  117760  117895  121626  126002  131427  175065  192753
In base 22:      5CB     8BE     G5B    2FB2    2LB8    3AB4    6GB1    6LBC    B16G    B1CJ    B96A    BI78    C7BL    G9FB    I25B

First 15 Rhonda numbers in base 24:
In base 10:    2080   2709   3976   5628   5656   7144   8296   9030  10094  17612  20559  24616  26224  29106  31458
In base 24:     3EG    4GL    6LG    9IC    9JG    C9G    E9G    FG6    HCE   16DK   1BGF   1IHG   1LCG   22CI   26EI

First 15 Rhonda numbers in base 25:
In base 10:     6764    9633   13260   22022   53382   57640   66015   69006   97014  140130  142880  144235  159724  162565  165504
In base 25:      AKE     FA8     L5A    1A5M    3AA7    3H5F    45FF    4AA6    655E    8O55    93F5    95JA    A5DO    AA2F    AEK4

First 15 Rhonda numbers in base 26:
In base 10:     7788    9322    9374   11160   22165   27885   34905   44785   47385   49257   62517   72709   74217  108745  132302
In base 26:      BDE     DKE     DME     GD6    16KD    1F6D    1PGD    2E6D    2I2D    2KMD    3ECD    43ED    45KD    64MD    7DIE

First 15 Rhonda numbers in base 27:
In base 10:    4797  11844  12078  13200  14841  17750  24320  26883  27477  46455  52750  58581  61009  61446  61500
In base 27:     6FI    G6I    GF9    I2O    K9I    O9B   169K   19NI   1AII   29JF   2I9J   2Q9I   32IG   337L   339L

First 15 Rhonda numbers in base 28:
In base 10:    3094   5808   5832   7462  11160  13671  27270  28194  28638  39375  39550  49500  50862  52338  52938
In base 28:     3QE    7BC    7C8    9EE    E6G    HC7   16LQ   17QQ   18EM   1M67   1MCE   273O   28OE   2AL6   2BEI

First 15 Rhonda numbers in base 30:
In base 10:    3024   3168   5115   5346   5950   6762   7750   7956   8470   9476   9576   9849  10360  11495  13035
In base 30:     3AO    3FI    5KF    5S6    6IA    7FC    8IA    8P6    9CA    AFQ    AJ6    AS9    BFA    CN5    EEF

First 15 Rhonda numbers in base 32:
In base 10:    1944   3600  13520  15876  16732  16849  25410  25752  28951  47472  49610  50968  61596  64904  74005
In base 32:     1SO    3GG    D6G    FG4    GAS    GEH    OQ2    P4O    S8N   1EBG   1GEA   1HOO   1S4S   1VC8   288L

First 15 Rhonda numbers in base 33:
In base 10:      756    7040    7568   13826   24930   30613   59345   63555   64372  131427  227840  264044  313709  336385  344858
In base 33:       MU     6FB     6VB     CMW     MTF     S3M    1LGB    1PBU    1Q3M    3LML    6B78    7BFB    8O2B    9BTG    9JM8

First 15 Rhonda numbers in base 34:
In base 10:     5661   14161   15620   16473   22185   37145  125579  134692  135405  138472  140369  177086  250665  255552  295614
In base 34:      4UH     C8H     DHE     E8H     J6H     W4H    36LH    3EHI    3F4H    3HQO    3JEH    4H6E    6CSH    6H28    7HOI

First 15 Rhonda numbers in base 35:
In base 10:     8232    9476    9633   18634   30954   41905   52215   52440   56889   61992   62146   66339   98260  102180  103305
In base 35:      6P7     7PQ     7U8     F7E     P9E     Y7A    17LU    17SA    1BFE    1FL7    1FPL    1J5E    2A7F    2DEF    2EBK

First 15 Rhonda numbers in base 36:
In base 10:    1000   4800   5670   8190  10998  12412  13300  15750  16821  23016  51612  52734  67744  70929  75030
In base 36:      RS    3PC    4DI    6BI    8HI    9KS    A9G    C5I    CZ9    HRC   13TO   14OU   1G9S   1IQ9   1LW6