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A319287 as a simple table

na(n)
15
213
317
429
537
641
753
861
973
1089
1197
12101
13109
14137
15149
16157
17173
18181
19193
20197
21229
22233
23241
24257
25269
26277
27281
28293
29313
30317
31337
32349
33389
34397
35401
36409
37421
38433
39449
40457
41461
42509
43521
44541
45557

[5,13,17,29,37,41,53,61,73,89,97,101,109,137,149,
 157,173,181,193,197,229,233,241,257,269,277,281,
 293,313,317,337,349,389,397,401,409,421,433,449,
 457,461,509,521,541,557]