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A038921 as a simple table

na(n)
12
23
37
411
513
617
719
829
941
1047
1153
1261
1379
1489
15107
16127
17139
18149
19151
20157
21167
22179
23181
24193
25197
26229
27257
28283
29307
30311
31317
32337
33347
34349
35353
36383
37389
38397
39443
40457
41463
42479
43487
44491
45503
46521

[2,3,7,11,13,17,19,29,41,47,53,61,79,89,107,127,
 139,149,151,157,167,179,181,193,197,229,257,283,
 307,311,317,337,347,349,353,383,389,397,443,457,
 463,479,487,491,503,521]