OFFSET
0,4
FORMULA
T(n,k) = n!*J(n-k+1)/k!, where J(n)=A001045(n).
Column k has e.g.f. (x^k/k!)/(1-x-2x^2).
EXAMPLE
Rows begin
1;
1,1;
6,2,1;
30,18,3,1;
264,120,36,4,1;
2520,1320,300,60,5,1;
30960,15120,3960,600,90,6,1;
CROSSREFS
KEYWORD
AUTHOR
Paul Barry, Jul 20 2005
STATUS
approved