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A003429 as a simple table

na(n)
15
27
315
427
557
6114
7243
8506
91102
102381
115269
1211686
1326277
1459348
15135317
16310064
17715475
181659321
193870414
209071915
2121372782
2250591199
23120332237

[5,7,15,27,57,114,243,506,1102,2381,5269,11686,
 26277,59348,135317,310064,715475,1659321,3870414,
 9071915,21372782,50591199,120332237]