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A161124 as a simple table

na(n)
00
11
212
3135
41680
523625
6374220
76621615
8129729600
92791213425
1065472907500
111663666579575
1245537716624400
131336089255125625
1441837777148667500
151392813754566609375
1649126088694402720000
171830138702650463830625
1871812362934450726087500

[0,1,12,135,1680,23625,374220,6621615,129729600,
 2791213425,65472907500,1663666579575,
 45537716624400,1336089255125625,41837777148667500,
 1392813754566609375,49126088694402720000,
 1830138702650463830625,71812362934450726087500]