W.Lang: a(n,m) tabl head (triangle) for  A073403 (falling powers)

n\m         0         1         2          3           4           5           6

  0         1         0         0          0           0           0           0
  1        12        36         0          0           0           0           0
  2       120       888      1536          0           0           0           0
  3      1152     15168     62592      80448           0           0           0
  4     10944    222336   1600704    4813056     5068800           0           0
  5    103680   2992896  32811264  169917696   413351424   375598080           0
  6    981504  38112768 587976192 4592982528 19066503168 39661608960 32103751680
                                                  


################### and for companion triangle A073404  ########################

W. Lang: a(n,m) tabl head (triangle) for  A073404 (falling powers)

 
n\m         0         1         2          3           4           5           6

  0         2         0         0          0           0           0           0
  1        12        36         0          0           0           0           0
  2        96       672      1056          0           0           0           0
  3       864     10752     40416      43968           0           0           0
  4      8064    156672   1051776    2815488     2396160           0           0
  5     76032   2121984  22125312  105981696   226492416   161879040           0
  6    718848  27205632 404656128 2995605504 11446769664 20766633984 13044326400
                                                  

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