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A139885 as a simple table

na(n)
15
243
383
4157
5163
6197
7277
8283
9347
10397
11443
12467
13557
14587
15613
16643
17653
18733
19757
20853
21883
22947
23997
241013
251163
261187
271213
281277
291373
301453
311483
321493
331597
341613
351733
361787
371867
381907
391973
401987
412053
422213
432243
442267
452357

[5,43,83,157,163,197,277,283,347,397,443,467,557,
 587,613,643,653,733,757,853,883,947,997,1013,1163,
 1187,1213,1277,1373,1453,1483,1493,1597,1613,1733,
 1787,1867,1907,1973,1987,2053,2213,2243,2267,2357]