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A247052 as a simple table

na(n)
12
25
37
411
517
641
747
871
9127
10151
11157
12211
13227
14241
15251
16257
17271
18277
19421
20457
21521
22541
23547
24557
25571
26577
27727
28751
29757
301117
311151
321171
331217
341277
351427
361447
371451
381471
391511
401571
411721
421741
431747
441777
452111
462141
472221
482251
492411
502417

[2,5,7,11,17,41,47,71,127,151,157,211,227,241,251,
 257,271,277,421,457,521,541,547,557,571,577,727,
 751,757,1117,1151,1171,1217,1277,1427,1447,1451,
 1471,1511,1571,1721,1741,1747,1777,2111,2141,2221,
 2251,2411,2417]