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A296935 as a simple table

na(n)
15
27
319
437
543
653
779
883
989
1097
11107
12113
13127
14131
15137
16139
17151
18157
19167
20181
21211
22227
23229
24239
25257
26263
27269
28271
29283
30307
31313
32317
33347
34353
35359
36389
37397
38401
39421
40431
41433
42439
43449
44479
45491
46503
47509
48521
49523
50547
51563
52571
53577
54607

[5,7,19,37,43,53,79,83,89,97,107,113,127,131,137,
 139,151,157,167,181,211,227,229,239,257,263,269,
 271,283,307,313,317,347,353,359,389,397,401,421,
 431,433,439,449,479,491,503,509,521,523,547,563,
 571,577,607]