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A243990 as a simple table

na(n)
12
241
361
4103
5113
6157
7227
8263
9283
10337
11349
12373
13383
14389
15431
16433
17449
18457
19557
20563
21577
22601
23631
24641
25677
26683
27691
28733
29751
30857
31881
32883
33911
34929
35953
36967
37983
38991
391009
401039
411093
421097
431151
441181
451279
461303
471373
481427
491451
501481

[2,41,61,103,113,157,227,263,283,337,349,373,383,
 389,431,433,449,457,557,563,577,601,631,641,677,
 683,691,733,751,857,881,883,911,929,953,967,983,
 991,1009,1039,1093,1097,1151,1181,1279,1303,1373,
 1427,1451,1481]