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A307718 as a simple table

na(n)
117
273
397
4113
5137
6193
7233
8313
9337
10401
11449
12457
13521
14569
15641
16673
17809
18929
19977
201009
211049
221129
231153
241201
251217
261249
271289
281297
291361
301409
311481
321609
331697
341873
351889
361913
372017
382137
392153
402273
412281
422377
432393
442417
452441
462521
472969
483001

[17,73,97,113,137,193,233,313,337,401,449,457,521,
 569,641,673,809,929,977,1009,1049,1129,1153,1201,
 1217,1249,1289,1297,1361,1409,1481,1609,1697,1873,
 1889,1913,2017,2137,2153,2273,2281,2377,2393,2417,
 2441,2521,2969,3001]