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A249383 as a simple table

na(n)
13
23
37
43
531
67
761
843
979
1019
11739
12103
132707
144513
15139
1613
174027
1828027
1914029
2087151
2111257
228677
23122449
24104161
25113287
26216211
27150097
28862009
29876721
30414949
314590451
321391281

[3,3,7,3,31,7,61,43,79,19,739,103,2707,4513,139,
 13,4027,28027,14029,87151,11257,8677,122449,
 104161,113287,216211,150097,862009,876721,414949,
 4590451,1391281]