OFFSET
2,1
COMMENTS
FORMULA
a(n, 2) = n^2-n. For k > 2, a(n, k) = sum_{j=1..min(floor(k/2)-1, n-2)} A008299(k-2, j)*n!*(k^2-k)/(2*(n-j-2)!).
EXAMPLE
Array begins:
2 0 0 0 0 0
6 0 36 60 90 126
12 0 144 240 1440 5544
CROSSREFS
KEYWORD
AUTHOR
David Wasserman, Jun 15 2007
STATUS
approved