

A228448


floor(n! / 3^n).


0



1, 0, 0, 0, 0, 0, 0, 2, 6, 18, 61, 225, 901, 3905, 18226, 91134, 486048, 2754274, 16525645, 104662422, 697749481, 4884246371, 35817806721, 274603184861, 2196825478892, 18306878990770, 158659617920008, 1427936561280078, 13327407905280733, 128831609751047086
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OFFSET

0,8


LINKS

Table of n, a(n) for n=0..29.


MATHEMATICA

Table[Floor[n!/3^n], {n, 0, 30}] (* Harvey P. Dale, May 24 2018 *)


PROG

(Python)
import math
for n in range(99): print str(math.factorial(n)/(3**n))+', ',


CROSSREFS

Cf. A000142, A066979, A212309.
Sequence in context: A150051 A148462 A123639 * A177473 A177471 A303117
Adjacent sequences: A228445 A228446 A228447 * A228449 A228450 A228451


KEYWORD

nonn,less


AUTHOR

Alex Ratushnyak, Oct 27 2013


STATUS

approved



