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A275770 as a simple table

na(n)
117
247
359
471
5101
6107
7137
8149
9167
10197
11227
12257
13263
14269
15311
16317
17347
18353
19383
20389
21401
22449
23461
24467
25479
26503
27521
28557
29563
30569
31587
32599
33617
34647
35677
36701
37773
38797
39821
40827
41839
42857
43863
44881
45887
46929
47941
48947
49971
50977
51983
521061
531091
541097

[17,47,59,71,101,107,137,149,167,197,227,257,263,
 269,311,317,347,353,383,389,401,449,461,467,479,
 503,521,557,563,569,587,599,617,647,677,701,773,
 797,821,827,839,857,863,881,887,929,941,947,971,
 977,983,1061,1091,1097]