OFFSET
1,3
LINKS
L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 60.
EXAMPLE
Triangle T(n,k) (with n >= 1 and 1 <= k <= n) begins as follows:
1;
1, 2;
1, 12, 6;
1, 86, 108, 24;
1, 840, 2310, 960, 120;
1, 11642, 65700, 42960, 9000, 720;
1, 227892, 2583126, 2510760, 712320, 90720, 5040;
...
CROSSREFS
KEYWORD
dead
AUTHOR
STATUS
approved