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A222090 as a simple table

na(n)
13
231
3308
43034
529860
6293848
72891636
828455036
9280009384
102755404412
1127114269752
12266815111088
132625565876172
1425836603103756
15254242357913972
162501845009992824
1724619140986161492
18242262050800828048

[3,31,308,3034,29860,293848,2891636,28455036,
 280009384,2755404412,27114269752,266815111088,
 2625565876172,25836603103756,254242357913972,
 2501845009992824,24619140986161492,
 242262050800828048]