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A339955 as a simple table

na(n)
15
217
325
437
545
661
765
873
989
10101
11109
12113
13125
14145
15149
16153
17169
18181
19193
20197
21205
22221
23225
24245
25257
26265
27277
28281
29305
30317
31325
32333
33337
34349
35365
36373
37377
38401
39405
40409
41425
42445
43449
44481
45485
46493
47509
48521
49533
50549
51565
52569
53577
54585
55601
56605
57613

[5,17,25,37,45,61,65,73,89,101,109,113,125,145,
 149,153,169,181,193,197,205,221,225,245,257,265,
 277,281,305,317,325,333,337,349,365,373,377,401,
 405,409,425,445,449,481,485,493,509,521,533,549,
 565,569,577,585,601,605,613]