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A181526 as a simple table

na(n)
12
23
35
47
513
623
729
831
941
1043
1147
1253
1361
1467
1579
1683
1789
1897
19103
20163
21241
22257
23421
24431
25457
26461
27463
28467
29479
30503
31523
32547
33563
34587
35613
36631
37641
38643
39647
40653
41683
42769
43853
44857
45863
46947
47967
481423
492053
502143
512341
522503
532543
542749
553461

[2,3,5,7,13,23,29,31,41,43,47,53,61,67,79,83,89,
 97,103,163,241,257,421,431,457,461,463,467,479,
 503,523,547,563,587,613,631,641,643,647,653,683,
 769,853,857,863,947,967,1423,2053,2143,2341,2503,
 2543,2749,3461]