a(n,m) tabl head (triangle) for  A111593
 
 Associated Sheffer triangle (1,tanh(x))
 
 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      16       0     -20       0       1       0       0       0       0
   6       0       0     136       0     -40       0       1       0       0       0
   7       0    -272       0     616       0     -70       0       1       0       0
   8       0       0   -3968       0    2016       0    -112       0       1       0
   9       0    7936       0  -28160       0    5376       0    -168       0       1
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