OFFSET
0,2
EXAMPLE
Triangle begins:
1;
2,1;
16,12,1;
440,416,62,1;
43600,48320,10016,312,1;
16698560,20765520,5394320,246016,1562,1;
26098464448,35382716032,10854556720,646408320,6116016,7812,1; ...
PROG
(PARI) {T(n, k)=local(M=matrix(n+1, n+1)); for(r=1, n+1, for(c=1, r, M[r, c]=if(r==c, 1, if(c>1, (M^5)[r-1, c-1])+(M^5)[r-1, c]))); return((M^2)[n+1, k+1])}
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Paul D. Hanna, Oct 14 2005
STATUS
approved