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

0,2

Links

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

Prog

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

Crossrefs

Cf. A126445; A126446, A126447, A126449.

Sequence in context: A248045 A280627 A196688 * A126446 A057003 A096718

Adjacent sequences: A126445 A126446 A126447 * A126449 A126450 A126451

Keyword

nonn

Author

Paul D. Hanna, Dec 27 2006

Status

approved