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A181067 as a simple table

na(n)
11
23
316
495
5606
64032
727616
8193167
91372930
109881498
1171846160
12526764680
133889340560
1428888634400
15215680108416
161617467908751
1712177754012458
1892004463332486
19697263463622080
205298985086555090
2140371796982444356

[1,3,16,95,606,4032,27616,193167,1372930,9881498,
 71846160,526764680,3889340560,28888634400,
 215680108416,1617467908751,12177754012458,
 92004463332486,697263463622080,5298985086555090,
 40371796982444356]