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A303677 as a simple table

na(n)
12
25
37
417
531
649
7103
8193
9327
10641
111207
122129
134039
147585
1513687
1625585
1747847
1887425
19162391
20302609
21556615
221031329
231916983
243538225
256550311
2612155585
2722474519
2841599313
2977121031
30142707937
31264156151
32489441649
33906031335

[2,5,7,17,31,49,103,193,327,641,1207,2129,4039,
 7585,13687,25585,47847,87425,162391,302609,556615,
 1031329,1916983,3538225,6550311,12155585,22474519,
 41599313,77121031,142707937,264156151,489441649,
 906031335]