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A168032 as a simple table

na(n)
12
27
311
423
537
679
7101
8107
9131
10149
11163
12227
13241
14283
15311
16353
17367
18379
19383
20409
21419
22457
23487
24509
25613
26661
27719
28761
29797
30971
31997
321049
331279
341321
351373
361447
371451
381453
391483
401531
411613
421699
431861
441877
452011
462039
472069
482137
492143

[2,7,11,23,37,79,101,107,131,149,163,227,241,283,
 311,353,367,379,383,409,419,457,487,509,613,661,
 719,761,797,971,997,1049,1279,1321,1373,1447,1451,
 1453,1483,1531,1613,1699,1861,1877,2011,2039,2069,
 2137,2143]