A126469 Row sums of triangle A126465.

1, 2, 5, 41, 972, 44457, 3271312, 352087787, 52098230423, 10141977387056, 2513121624034518, 772525844883337679, 288558785171538716889, 128760943237115947732171, 67665205307818875323789155

Offset

0,2

Links

Table of n, a(n) for n=0..14.

Prog

(PARI) {a(n)=local(M=matrix(n+1, n+1, r, c, if(r>=c, binomial((r-1)*r*(r+1)/3!-(c-1)*c*(c+1)/3!, r-c))), N=matrix(n+1, n+1, r, c, if(r>=c, binomial((r-1)*r*(r+1)/3!-(c-1)*c*(c+1)/3!+1, r-c)))); sum(k=0, n, (N*M^-1)[n+1, k+1])}

Crossrefs

Cf. A126465, A126466, A126467, A126468.

Sequence in context: A009457 A175172 A218057 * A093433 A054859 A076725

Adjacent sequences: A126466 A126467 A126468 * A126470 A126471 A126472

Keyword

nonn

Author

Paul D. Hanna, Dec 27 2006

Status

approved