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A197227 as a simple table

na(n)
12
23
37
411
513
619
729
837
943
1047
1161
1273
1379
1489
15103
16107
17113
18137
19149
20151
21157
22163
23167
24179
25191
26193
27227
28229
29239
30241
31257
32277
33283
34293
35307
36313
37317
38337
39347
40359
41367
42383
43389
44397
45409
46419
47433
48461
49467
50509
51521
52541
53547
54557
55569

[2,3,7,11,13,19,29,37,43,47,61,73,79,89,103,107,
 113,137,149,151,157,163,167,179,191,193,227,229,
 239,241,257,277,283,293,307,313,317,337,347,359,
 367,383,389,397,409,419,433,461,467,509,521,541,
 547,557,569]