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A350978 as a simple table

na(n)
13
29
319
431
533
635
751
873
981
1099
11105
12129
13145
14147
15161
16163
17179
18195
19201
20233
21243
22273
23289
24291
25297
26339
27361
28387
29393
30451
31465
32467
33483
34489

[3,9,19,31,33,35,51,73,81,99,105,129,145,147,161,
 163,179,195,201,233,243,273,289,291,297,339,361,
 387,393,451,465,467,483,489]