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A118680 as a simple table

na(n)
12
22
37
411
52
611
729
837
923
101
1167
1279
1323
1453
1511
16137
171
1843
19191
20211
2129
22127
23277
2443
25163
261
27379
2837
29109
30233
3171
3223
33281
34149
35631
361
371
3853
3971
40821
41431
42113
43947
44991
451
46541
471129
48107
49613
501

[2,2,7,11,2,11,29,37,23,1,67,79,23,53,11,137,1,43,
 191,211,29,127,277,43,163,1,379,37,109,233,71,23,
 281,149,631,1,1,53,71,821,431,113,947,991,1,541,
 1129,107,613,1]