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A368277 as a simple table

na(n)
15
27
313
417
523
643
753
859
961
1071
1179
1283
13107
14109
15113
16127
17131
18137
19139
20167
21181
22191
23193
24199
25211
26223
27227
28239
29241
30257
31271
32277
33293
34307
35313
36317
37331
38337
39347
40353
41359
42367
43379
44389
45401
46421
47431
48439
49449
50457
51461
52467
53479
54499

[5,7,13,17,23,43,53,59,61,71,79,83,107,109,113,
 127,131,137,139,167,181,191,193,199,211,223,227,
 239,241,257,271,277,293,307,313,317,331,337,347,
 353,359,367,379,389,401,421,431,439,449,457,461,
 467,479,499]