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A397628 as a simple table

na(n)
15
213
319
431
543
653
767
873
989
10103
11109
12131
13149
14157
15173
16181
17197
18223
19229
20241
21257
22271
23283
24307
25317
26347
27353
28373
29383
30401
31421
32433
33449
34463
35479
36499
37509
38541
39563
40571
41593
42601
43617
44641
45647
46661
47683
48701
49727
50739
51757
52773
53797
54821

[5,13,19,31,43,53,67,73,89,103,109,131,149,157,
 173,181,197,223,229,241,257,271,283,307,317,347,
 353,373,383,401,421,433,449,463,479,499,509,541,
 563,571,593,601,617,641,647,661,683,701,727,739,
 757,773,797,821]