a(n,m) triangle A111594 n\m 0 1 2 3 4 5 6 7 8 9 . . . 0 1 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 2 0 0 1 0 0 0 0 0 0 0 3 0 2 0 1 0 0 0 0 0 0 4 0 0 8 0 1 0 0 0 0 0 5 0 24 0 20 0 1 0 0 0 0 6 0 0 184 0 40 0 1 0 0 0 7 0 720 0 784 0 70 0 1 0 0 8 0 0 8448 0 2464 0 112 0 1 0 9 0 40320 0 52352 0 6384 0 168 0 1 . . .