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A091482 (3*n)^n. 0
1, 3, 36, 729, 20736, 759375, 34012224, 1801088541, 110075314176, 7625597484987, 590490000000000, 50542106513726817, 4738381338321616896, 482880748567480579719, 53148384174432398229504 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

MAPLE

restart:a:=n->mul(3*sum(1, j=0..n), k=0..n): seq(a(n), n=-1..13); # [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jan 01 2009]

CROSSREFS

Sequence in context: A199258 A203493 A006587 * A121245 A193754 A173217

Adjacent sequences:  A091479 A091480 A091481 * A091483 A091484 A091485

KEYWORD

nonn

AUTHOR

Christian G. Bower (bowerc(AT)usa.net), Jan 13 2004

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Last modified February 15 08:49 EST 2012. Contains 205740 sequences.