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A038908 as a simple table

na(n)
15
27
313
419
523
643
747
853
959
1061
1171
1273
1379
1489
15109
16113
17127
18137
19139
20151
21179
22191
23193
24211
25241
26251
27257
28269
29271
30277
31283
32307
33311
34317
35337
36349
37353
38373
39383
40389
41401
42409
43419
44439
45443
46449

[5,7,13,19,23,43,47,53,59,61,71,73,79,89,109,113,
 127,137,139,151,179,191,193,211,241,251,257,269,
 271,277,283,307,311,317,337,349,353,373,383,389,
 401,409,419,439,443,449]