Riordan numbers: Difference between revisions

=={{header|Quackery}}==

<syntaxhighlight lang="Quackery"> [ dup -1 peek 2 *

over -2 peek 3 * +

over size tuck 1 - *

swap 1+ /

join ] is nextterm ( [ --> [ )

say "first 32 Riordan numbers: "

' [ 1 0 ]

30 times nextterm

witheach [ echo sp ]

cr cr

say "1000th Riordan number has "

' [ 1 0 ]

1000 2 - times nextterm

-1 peek number$ size echo

say " digits"

cr cr

say "10000th Riordan number has "

' [ 1 0 ]

10000 2 - times nextterm

-1 peek number$ size echo

say " digits"

</syntaxhighlight>

{{out}}

<pre>first 32 Riordan numbers: 1 0 1 1 3 6 15 36 91 232 603 1585 4213 11298 30537 83097 227475 625992 1730787 4805595 13393689 37458330 105089229 295673994 834086421 2358641376 6684761125 18985057351 54022715451 154000562758 439742222071 1257643249140

1000th Riordan number has 472 digits

10000th Riordan number has 4765 digits</pre>