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A032681 as a simple table

na(n)
13
29
325
427
531
633
737
857
961
1075
1179
1281
1391
1493
1597
16115
17117
18121
19123
20135
21139
22145
23151
24177
25181
26211
27213
28223
29231
30235
31249
32253
33267
34273
35277
36285
37291
38303
39315
40331
41339
42349
43373
44387
45399
46403
47409
48421
49423
50429
51441
52451

[3,9,25,27,31,33,37,57,61,75,79,81,91,93,97,115,
 117,121,123,135,139,145,151,177,181,211,213,223,
 231,235,249,253,267,273,277,285,291,303,315,331,
 339,349,373,387,399,403,409,421,423,429,441,451]