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A086508 as a simple table

na(n)
12
23
37
43
511
65
729
87
919
1019
1123
1211
1353
1413
1531
1631
17103
1817
19191
2019
2143
2243
2347
2423
25101
26103
27109
2883
2959
3029
31311
3231
3367
3467
3571
3671
37149
3837
3979
4079
4183
4241
43173
4443
45181
46137
47283
4847
49197
50149
51103
52103
53107
5453
55331
56167
57229
58173
59709
6059
61367
6261
63127

[2,3,7,3,11,5,29,7,19,19,23,11,53,13,31,31,103,17,
 191,19,43,43,47,23,101,103,109,83,59,29,311,31,67,
 67,71,71,149,37,79,79,83,41,173,43,181,137,283,47,
 197,149,103,103,107,53,331,167,229,173,709,59,367,
 61,127]