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A140549 as a simple table

na(n)
12
23
35
411
513
617
723
843
947
1071
1173
1297
13103
14107
15113
16137
17139
18163
19167
20181
21191
22193
23197
24199
25223
26227
27239
28257
29269
30277
31281
32283
33307
34311
35313
36317
37347
38349
39373
40383
41433
42449
43463
44467
45491
46503
47523
48557
49587
50601
51607
52613
53617
54643
55647

[2,3,5,11,13,17,23,43,47,71,73,97,103,107,113,137,
 139,163,167,181,191,193,197,199,223,227,239,257,
 269,277,281,283,307,311,313,317,347,349,373,383,
 433,449,463,467,491,503,523,557,587,601,607,613,
 617,643,647]