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
KEYWORD
nonn
AUTHOR
Jorge Coveiro, Dec 26 2004
STATUS
approved