A126458 Column 0 of triangle A126457; a(n) = C( C(n+2,3) + 3, n).

1, 4, 21, 286, 8855, 501942, 45057474, 5843355957, 1029873432159, 236236542585120, 68292983465630781, 24268885951464043344, 10392619362579990298763, 5276256293478688846049120

Offset

0,2

Links

Table of n, a(n) for n=0..13.

Prog

(PARI) a(n)=binomial(n*(n+1)*(n+2)/3!+3, n)

Crossrefs

Cf. A126457, A126459; A126446, A126451, A126455.

Sequence in context: A324954 A198050 A270482 * A319363 A270586 A048164

Adjacent sequences: A126455 A126456 A126457 * A126459 A126460 A126461

Keyword

nonn

Author

Paul D. Hanna, Dec 27 2006

Status

approved