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A296929 as a simple table

na(n)
13
27
311
413
523
631
753
871
979
1089
11101
12107
13131
14137
15139
16149
17157
18163
19167
20199
21211
22227
23229
24257
25281
26283
27293
28311
29347
30349
31353
32367
33373
34379
35389
36409
37419
38421
39431
40433
41439
42457
43461
44479
45487
46499
47503
48509
49547
50557
51569
52571
53577
54593
55607

[3,7,11,13,23,31,53,71,79,89,101,107,131,137,139,
 149,157,163,167,199,211,227,229,257,281,283,293,
 311,347,349,353,367,373,379,389,409,419,421,431,
 433,439,457,461,479,487,499,503,509,547,557,569,
 571,577,593,607]