A126448 Column 2 of triangle A126445; a(n) = C( C(n+4,3) - 4, n).

1, 6, 120, 4495, 270725, 24040016, 2967205528, 487444845680, 103073959989495, 27319423696620550, 8881600973913295056, 3478625214672347911080, 1616770762998304775695925, 880246034121663208464847200

Offset: 0

Author

Paul D. Hanna, Dec 27 2006

Keywords

• nonn

Crossrefs

Cf. A126445; A126446, A126447, A126449.

Programs

PARI

a(n)=binomial((n+2)*(n+3)*(n+4)/3!-4, n)