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A208241 as a simple table

na(n)
12
25
37
417
511
613
729
817
919
1041
1123
1297
1353
1429
1531
1667
1771
1837
1979
2041
2143
2289
2347
2497
25101
2653
27109
28113
2959
3061
31127
32131
3367
34137
3571
3673
37149
38307
3979
40163
4183
42337
43173
4489
45181
46373
47191
4897
49197
50101
51103
52211
53107
54109
55223
56113
57229
58233
59239

[2,5,7,17,11,13,29,17,19,41,23,97,53,29,31,67,71,
 37,79,41,43,89,47,97,101,53,109,113,59,61,127,131,
 67,137,71,73,149,307,79,163,83,337,173,89,181,373,
 191,97,197,101,103,211,107,109,223,113,229,233,
 239]