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A111542 as a simple table

na(n)
00
12
25
322
4128
5896
67220
765336
8653720
97155104
1084998768
111089232160
1214981704736
13220233312896
143447195190592
1557261708795776
161006401042534272
1718663532970127872
18364283224523605760
197466218532765196800

[0,2,5,22,128,896,7220,65336,653720,7155104,
 84998768,1089232160,14981704736,220233312896,
 3447195190592,57261708795776,1006401042534272,
 18663532970127872,364283224523605760,
 7466218532765196800]