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A171139 as a simple table

na(n)
12
23
317
419
523
629
747
867
973
1097
11113
12151
13163
14173
15223
16227
17229
18239
19251
20257
21263
22311
23331
24359
25367
26373
27389
28409
29419
30433
31439
32457
33463
34491
35503
36523
37541
38563
39569
40607
41701
42733
43809
44853
45877
46883
47941
48953
49967
50983
511013
521033
531049

[2,3,17,19,23,29,47,67,73,97,113,151,163,173,223,
 227,229,239,251,257,263,311,331,359,367,373,389,
 409,419,433,439,457,463,491,503,523,541,563,569,
 607,701,733,809,853,877,883,941,953,967,983,1013,
 1033,1049]