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A153647 a(n) = 3^n*(n + 2)!. 1
2, 18, 216, 3240, 58320, 1224720, 29393280, 793618560, 23808556800, 785682374400, 28284565478400, 1103098053657600, 46330118253619200, 2084855321412864000, 100073055427817472000, 5103725826818691072000, 275601194648209317888000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..300

MATHEMATICA

Table[3^n*(n + 2)!, {n, 0, 30}]

PROG

(MAGMA) [3^n*Factorial(n + 2): n in [0..20]]; // Vincenzo Librandi, Aug 24 2016

CROSSREFS

Sequence in context: A092882 A123855 A121407 * A052726 A217239 A279045

Adjacent sequences:  A153644 A153645 A153646 * A153648 A153649 A153650

KEYWORD

nonn

AUTHOR

Roger L. Bagula and Gary W. Adamson, Dec 30 2008

STATUS

approved

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Last modified December 12 07:31 EST 2019. Contains 329948 sequences. (Running on oeis4.)