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A086983 as a simple table

na(n)
12
23
35
47
511
613
717
819
923
1031
1137
1243
1347
1453
1561
1667
1771
1873
1979
2097
21103
22107
23127
24151
25157
26163
27191
28193
29199
30211
31223
32241
33271
34277
35283
36313
37331
38337
39367
40383
41397
42421
43431
44457
45463
46487
47499
48523
49541
50547
51577
52607
53613
54631
55647
56661
57673

[2,3,5,7,11,13,17,19,23,31,37,43,47,53,61,67,71,
 73,79,97,103,107,127,151,157,163,191,193,199,211,
 223,241,271,277,283,313,331,337,367,383,397,421,
 431,457,463,487,499,523,541,547,577,607,613,631,
 647,661,673]