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A031379 as a simple table

na(n)
15
219
341
461
583
6107
7137
8163
9191
10223
11241
12271
13307
14337
15367
16397
17431
18457
19487
20521
21563
22593
23617
24647
25677
26719
27751
28787
29823
30857
31883
32929
33967
34997
351031
361061
371093
381123
391171
401213
411237
421283
431303
441361
451409
461439
471471

[5,19,41,61,83,107,137,163,191,223,241,271,307,
 337,367,397,431,457,487,521,563,593,617,647,677,
 719,751,787,823,857,883,929,967,997,1031,1061,
 1093,1123,1171,1213,1237,1283,1303,1361,1409,1439,
 1471]