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A138751 as a simple table

na(n)
12
27
33
417
57
629
711
841
913
1017
1167
1279
1323
1489
1529
1629
1731
18127
19137
2037
21149
22163
2343
2447
25197
2653
27211
2859
29223
3059
31257
3267
3371
34281
3579
36307
37317
38331
3989
4089
4197
42367
4397
44389
45101
46401
47431
48449
49127
50461
51127
52127
53487
54127
55131
56137
57137
58547
59557
60149

[2,7,3,17,7,29,11,41,13,17,67,79,23,89,29,29,31,
 127,137,37,149,163,43,47,197,53,211,59,223,59,257,
 67,71,281,79,307,317,331,89,89,97,367,97,389,101,
 401,431,449,127,461,127,127,487,127,131,137,137,
 547,557,149]