OFFSET
0,2
COMMENTS
EXAMPLE
Triangle begins:
1;
2,1;
6,3,1;
35,15,4,1;
330,120,28,5,1;
4368,1365,286,45,6,1;
74613,20349,3876,560,66,7,1;
1560780,376740,65780,8855,969,91,8,1; ...
PROG
(PARI) T(n, k)=binomial(n*(n-1)/2-k*(k-1)/2 +n-k+1, n-k)
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Paul D. Hanna, Jun 04 2005
STATUS
approved