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A007521 as a simple table

na(n)
15
213
329
437
553
661
7101
8109
9149
10157
11173
12181
13197
14229
15269
16277
17293
18317
19349
20373
21389
22397
23421
24461
25509
26541
27557
28613
29653
30661
31677
32701
33709
34733
35757
36773
37797
38821
39829
40853
41877
42941
43997
441013
451021
461061
471069
481093
491109
501117
511181
521213

[5,13,29,37,53,61,101,109,149,157,173,181,197,229,
 269,277,293,317,349,373,389,397,421,461,509,541,
 557,613,653,661,677,701,709,733,757,773,797,821,
 829,853,877,941,997,1013,1021,1061,1069,1093,1109,
 1117,1181,1213]