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A126459 Column 1 of triangle A126457; a(n) = C( C(n+3,3) + 2, n). 5
1, 6, 66, 1540, 66045, 4582116, 470155077, 66983637864, 12655529067060, 3062465626261470, 923729223066105456, 339813167168828020668, 149762733221010818774320, 77904783726874238769542600 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
PROG
(PARI) a(n)=binomial((n+1)*(n+2)*(n+3)/3!+2, n)
CROSSREFS
Sequence in context: A271220 A259123 A292026 * A054969 A068966 A063039
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Dec 27 2006
STATUS
approved

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Last modified March 28 14:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)