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A045446 as a simple table

na(n)
15
27
319
429
543
647
761
871
989
10103
11113
12127
13131
14173
15197
16211
17229
18239
19257
20271
21281
22313
23337
24379
25383
26397
27421
28439
29449
30463
31467
32491
33509
34523
35547
36593
37607
38617
39631
40659
41673
42677
43691
44701
45719

[5,7,19,29,43,47,61,71,89,103,113,127,131,173,197,
 211,229,239,257,271,281,313,337,379,383,397,421,
 439,449,463,467,491,509,523,547,593,607,617,631,
 659,673,677,691,701,719]