OFFSET
0,2
EXAMPLE
Triangle begins:
1;
3,1;
33,18,1;
1251,903,93,1;
173505,151716,22278,468,1;
94216515,94758285,17789766,551778,2343,1;
210576669921,235461277878,53137278735,2167944516,13749903,11718,1;
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^3)[n+1, k+1])}
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Paul D. Hanna, Oct 14 2005
STATUS
approved