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A100043
a(n) = (3*n-1)!.
1
2, 120, 40320, 39916800, 87178291200, 355687428096000, 2432902008176640000, 25852016738884976640000, 403291461126605635584000000, 8841761993739701954543616000000, 263130836933693530167218012160000000
OFFSET
1,1
MAPLE
seq( (3*n-1)!, n=1..13);
PROG
(Sage) [stirling_number1(3*n, 1) for n in range(1, 22)] # Zerinvary Lajos, Nov 26 2009
CROSSREFS
Sequence in context: A187880 A331500 A024343 * A181760 A290247 A100012
KEYWORD
nonn
AUTHOR
Jorge Coveiro, Dec 26 2004
STATUS
approved