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A140560 as a simple table

na(n)
12
23
35
419
547
661
789
8103
9113
10131
11139
12157
13173
14179
15191
16223
17229
18257
19269
20271
21293
22311
23313
24331
25347
26373
27383
28397
29421
30439
31443
32463
33467
34487
35499
36503
37509
38521
39523
40593
41599
42607
43619
44641
45659
46673
47677
48683
49691
50701
51719
52733
53751
54761

[2,3,5,19,47,61,89,103,113,131,139,157,173,179,
 191,223,229,257,269,271,293,311,313,331,347,373,
 383,397,421,439,443,463,467,487,499,503,509,521,
 523,593,599,607,619,641,659,673,677,683,691,701,
 719,733,751,761]