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A229006 as a simple table

na(n)
13
27
315
431
557
6105
7193
8353
9653
101209
112241
124161
137719
1414325
1526581
1649311
1791489
18169729
19314881
20584177
211083761
222010609
233730105
246920121
2512838307
2623817773
2744187025
2881976335
29152083481
30282147169
31523442893
32971097649

[3,7,15,31,57,105,193,353,653,1209,2241,4161,7719,
 14325,26581,49311,91489,169729,314881,584177,
 1083761,2010609,3730105,6920121,12838307,23817773,
 44187025,81976335,152083481,282147169,523442893,
 971097649]