OFFSET
1,2
FORMULA
T(n,n-1) = (2*n-5)*(n-2)! for n>3.
EXAMPLE
Triangle starts:
1;
2, 0;
4, 0, 2;
10, 2, 6, 6;
26, 6, 22, 36, 30;
76, 24, 92, 144, 216, 168;
232, 80, 334, 640, 1150, 1524, 1080;
764, 312, 1328, 2984, 5516, 9712, 11784, 7920;
2620, 1152, 5234, 13296, 27668, 55750, 90240, 101400, 65520;
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Seiichi Manyama, Oct 21 2023
STATUS
approved