A126469 Row sums of triangle A126465.

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

Offset: 0

Author

Paul D. Hanna, Dec 27 2006

Keywords

• nonn

Crossrefs

Cf. A126465, A126466, A126467, A126468.

Programs

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])}