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A309695 as a simple table

na(n)
15
27
311
41481
53457
616057
719417
879687
9195731
10247601
11266677
12284737
13375247
14463447
15465161
16633791
17661091
18666427
19829721
20857951
21978067
221022501
231091257
241091261
251173581
261182277
271230367
281246361
291324567
301368461
311830337
321904467
332202787
342418671

[5,7,11,1481,3457,16057,19417,79687,195731,247601,
 266677,284737,375247,463447,465161,633791,661091,
 666427,829721,857951,978067,1022501,1091257,
 1091261,1173581,1182277,1230367,1246361,1324567,
 1368461,1830337,1904467,2202787,2418671]