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A275115 as a simple table

na(n)
12
23
37
45
529
67
711
817
913
1011
1147
1213
1317
1423
1519
1617
1753
1819
1923
2029
2137
2223
2359
2473
2529
26107
2731
2829
29173
3031
3147
3241
3337
3443
3571
3637
3741
3847
3943
4041
41173
4243
4347
4453
4561
4647
4783
4873
4953
5059
5167
5253
5389
5479
5559
56137
5761
5859
59317
6061
6197
6271
6367
6473
65101
6667
6771
68149
6973
7071

[2,3,7,5,29,7,11,17,13,11,47,13,17,23,19,17,53,19,
 23,29,37,23,59,73,29,107,31,29,173,31,47,41,37,43,
 71,37,41,47,43,41,173,43,47,53,61,47,83,73,53,59,
 67,53,89,79,59,137,61,59,317,61,97,71,67,73,101,
 67,71,149,73,71]