a(m,n) tabl head (triangle) for  A092081
 
   m\n      0      1        2        3        4        5        6        7         8         9
 
   0        1      0        0        0        0        0        0        0         0         0
   1        1      2        0        0        0        0        0        0         0         0
   2        1      3        8        0        0        0        0        0         0         0
   3        1      4       15       48        0        0        0        0         0         0
   4        1      5       24      105      384        0        0        0         0         0
   5        1      6       35      192      945     3840        0        0         0         0
   6        1      7       48      315     1920    10395    46080        0         0         0
   7        1      8       63      480     3465    23040   135135   645120         0         0
   8        1      9       80      693     5760    45045   322560  2027025  10321920         0
   9        1     10       99      960     9009    80640   675675  5160960  34459425 185794560