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A296931 as a simple table

na(n)
12
23
37
411
513
617
723
831
953
1071
1179
1289
13101
14107
15131
16137
17139
18149
19157
20163
21167
22199
23211
24227
25229
26257
27281
28283
29293
30311
31347
32349
33353
34367
35373
36379
37389
38409
39419
40421
41431
42433
43439
44457
45461
46479
47487
48499
49503
50509
51547
52557

[2,3,7,11,13,17,23,31,53,71,79,89,101,107,131,137,
 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]