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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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified December 14 05:36 EST 2019. Contains 329978 sequences. (Running on oeis4.)