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A097958 as a simple table

na(n)
13
27
317
423
531
641
747
871
973
1079
1189
1297
13103
14113
15127
16137
17151
18167
19191
20193
21199
22223
23233
24239
25241
26257
27263
28271
29281
30311
31313
32337
33353
34359
35367
36383
37401
38409
39431
40433
41439
42449
43457
44463
45479
46487
47503
48521
49569
50577
51593
52599
53601
54607
55617

[3,7,17,23,31,41,47,71,73,79,89,97,103,113,127,
 137,151,167,191,193,199,223,233,239,241,257,263,
 271,281,311,313,337,353,359,367,383,401,409,431,
 433,439,449,457,463,479,487,503,521,569,577,593,
 599,601,607,617]