A126449 Row sums of triangle A126445; a(n) = Sum_{k=0..n} C( C(n+2,3) - C(k+2,3), n-k).

1, 2, 10, 163, 5945, 375819, 36233754, 4932046435, 899372990826, 211481102358562, 62283285977509563, 22451501854089680715, 9722649026348549481236, 4980474318644453218716459

Offset: 0

Author

Paul D. Hanna, Dec 27 2006

Keywords

• nonn

Crossrefs

Cf. A126445; A126446, A126447, A126448.

Programs

PARI

a(n)=sum(k=0,n,binomial(binomial(n+2,3)-binomial(k+2,3), n-k))