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A037517 as a simple table

na(n)
12
216
3129
41034
58272
666177
7529418
84235344
933882753
10271062026
112168496208
1217347969665
13138783757322
141110270058576
158882160468609
1671057283748874
17568458269990992
184547666159927937

[2,16,129,1034,8272,66177,529418,4235344,33882753,
 271062026,2168496208,17347969665,138783757322,
 1110270058576,8882160468609,71057283748874,
 568458269990992,4547666159927937]