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A157495 as a simple table

na(n)
12
22
35
43
52
613
713
83
97
1013
1131
1237
135
147
1511
1617
1723
1861
193
207
2137
2243
232
2453
2561
2637
273
287
2973
3013
31127
3231
3337
34103
355
367
3713
3819
3923
4029
4179
4237
4347
44157
4553
463
4767
4879
492
50193
5137
5243
5397
54107
5561
567
5713
58127
59241
60137
61139
6237
63163
64167
65277
6661
677
6813
6923
70313
7129
72103

[2,2,5,3,2,13,13,3,7,13,31,37,5,7,11,17,23,61,3,7,
 37,43,2,53,61,37,3,7,73,13,127,31,37,103,5,7,13,
 19,23,29,79,37,47,157,53,3,67,79,2,193,37,43,97,
 107,61,7,13,127,241,137,139,37,163,167,277,61,7,
 13,23,313,29,103]