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A204938 as a simple table

na(n)
13
25
37
43
511
617
729
841
947
1053
1159
1271
1383
1489
1597
163
1717
1823
1929
2047
2153
2259
2371
2489
25113
26137
27173
28179
29191
30227
31239
32257
33281
34317
35347
36353
37359
38383
39401
40431
41443
42479
43491
44509
45521
46557
47569
48599
49617
50641
51647
52653
53683
54719
55743
56761
57773

[3,5,7,3,11,17,29,41,47,53,59,71,83,89,97,3,17,23,
 29,47,53,59,71,89,113,137,173,179,191,227,239,257,
 281,317,347,353,359,383,401,431,443,479,491,509,
 521,557,569,599,617,641,647,653,683,719,743,761,
 773]