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A074856 as a simple table

na(n)
12
25
313
417
531
637
761
879
989
1097
11109
12127
13139
14193
15229
16277
17307
18311
19313
20349
21373
22379
23401
24409
25439
26457
27499
28541
29569
30571
31577
32653
33661
34691
35701
36709
37751
38811
39823
40829
41877
42991
431021
441069
451087
461201
471291
481381
491429
501483
511549
521597

[2,5,13,17,31,37,61,79,89,97,109,127,139,193,229,
 277,307,311,313,349,373,379,401,409,439,457,499,
 541,569,571,577,653,661,691,701,709,751,811,823,
 829,877,991,1021,1069,1087,1201,1291,1381,1429,
 1483,1549,1597]