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A164097 as a simple table

na(n)
13
27
319
427
547
659
787
8103
9139
10159
11203
12227
13279
14307
15367
16399
17467
18503
19579
20619
21703
22747
23839
24887
25987
261039
271147
281203
291319
301379
311503
321567
331699
341767
351907
361979
372127
382203
392359
402439
412603
422687
432859
442947
453127
463219
473407
483503
493699

[3,7,19,27,47,59,87,103,139,159,203,227,279,307,
 367,399,467,503,579,619,703,747,839,887,987,1039,
 1147,1203,1319,1379,1503,1567,1699,1767,1907,1979,
 2127,2203,2359,2439,2603,2687,2859,2947,3127,3219,
 3407,3503,3699]