A126468 Column 2 of triangle A126465.

1, 1, 10, 255, 11935, 879571, 93365328, 13464554610, 2531141851260, 601339958510170, 176255315943299736, 62514948119465302825, 26407795709641456484010, 13109371824722841349352160

Offset

0,3

Links

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

Prog

(PARI) {a(n)=local(M=matrix(n+3, n+3, r, c, if(r>=c, binomial((r-1)*r*(r+1)/3!-(c-1)*c*(c+1)/3!, r-c))), N=matrix(n+3, n+3, r, c, if(r>=c, binomial((r-1)*r*(r+1)/3!-(c-1)*c*(c+1)/3!+1, r-c)))); (N*M^-1)[n+3, 3]}

Crossrefs

Cf. A126465, A126466, A126467; A126469 (row sums).

Sequence in context: A059166 A100743 A251588 * A336665 A024293 A361559

Adjacent sequences: A126465 A126466 A126467 * A126469 A126470 A126471

Keyword

nonn

Author

Paul D. Hanna, Dec 27 2006

Status

approved