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
  .
  .
  .