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A056874 as a simple table

na(n)
13
25
311
423
531
637
747
853
959
1067
1171
1289
1397
14103
15113
16137
17157
18163
19179
20181
21191
22199
23223
24229
25251
26257
27269
28311
29313
30317
31331
32353
33367
34379
35383
36389
37397
38401
39419
40421
41433
42443
43449
44463
45467
46487
47499
48509
49521
50577
51587
52599

[3,5,11,23,31,37,47,53,59,67,71,89,97,103,113,137,
 157,163,179,181,191,199,223,229,251,257,269,311,
 313,317,331,353,367,379,383,389,397,401,419,421,
 433,443,449,463,467,487,499,509,521,577,587,599]