Talk:Sequence: nth number with exactly n divisors: Difference between revisions

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→‎Handy hints

CalmoSoft

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Revision as of 18:53, 11 April 2019 (view source) Thundergnat (talk \| contribs) (→‎Handy hint: new section)		Latest revision as of 13:56, 8 March 2021 (view source) CalmoSoft (talk \| contribs) (→‎Handy hints)
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Line 1: == Handy ~~hint~~hints == Handy optimization ~~hint~~hints: Terms in position n that is a prime number are '''always''' the nth prime raised to the (n-1)th power. E.G. # 1 2 3 4 5 6 7 8 9 10 11 Line 9: Term 11 is 31^10 == 819628286980801. and so on. and so on. --[[User:Thundergnat\|Thundergnat]] ([[User talk:Thundergnat\|talk]]) 18:53, 11 April 2019 (UTC)▼ ▲~~and~~Non soprime onodd terms are '''always''' a square number. --[[User:Thundergnat\|Thundergnat]] ([[User talk:Thundergnat\|talk]]) 18:53, 11 April 2019 (UTC) : ''All''   odd terms are '''always''' a square number.     -- [[User:Gerard Schildberger\|Gerard Schildberger]] ([[User talk:Gerard Schildberger\|talk]]) 01:02, 12 April 2019 (UTC) :: You are 100% correct, but these were meant to be optimization hints, not statements of general fact. Sort of an either / or kind of thing. --[[User:Thundergnat\|Thundergnat]] ([[User talk:Thundergnat\|talk]]) 09:59, 12 April 2019 (UTC) : That is one <strike>hel</strike> heck of some dandy hints!!     -- [[User:Gerard Schildberger\|Gerard Schildberger]] ([[User talk:Gerard Schildberger\|talk]]) 18:56, 11 April 2019 (UTC) May this is a naive question: Why 2nd term of sequence is not 2 but 3. <br>2 has exactly 2 divisors: 1 and 2 (CalmoSoft) : 2 is the '''first''' number with exactly 2 divisors but 3 is the '''second''' such number. So, 3 is the second term of the sequence. --[[User:PureFox\|PureFox]] ([[User talk:PureFox\|talk]]) 13:48, 8 March 2021 (UTC) <br> : Thanks PureFox, now I understand it (CalmoSoft)