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A042993 as a simple table

na(n)
12
23
35
47
513
617
723
837
943
1047
1153
1267
1373
1483
1597
16103
17107
18113
19127
20137
21157
22163
23167
24173
25193
26197
27223
28227
29233
30257
31263
32277
33283
34293
35307
36313
37317
38337
39347
40353
41367
42373
43383
44397
45433
46443
47457

[2,3,5,7,13,17,23,37,43,47,53,67,73,83,97,103,107,
 113,127,137,157,163,167,173,193,197,223,227,233,
 257,263,277,283,293,307,313,317,337,347,353,367,
 373,383,397,433,443,457]