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A167168 as a simple table

na(n)
13
27
317
419
531
643
753
867
971
1079
1197
12103
13109
14113
15127
16137
17151
18163
19173
20181
21191
22197
23199
24211
25229
26239
27241
28251
29257
30269
31271
32283
33293
34317
35331
36337
37349
38367
39373

[3,7,17,19,31,43,53,67,71,79,97,103,109,113,127,
 137,151,163,173,181,191,197,199,211,229,239,241,
 251,257,269,271,283,293,317,331,337,349,367,373]