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A167798 as a simple table

na(n)
15
27
313
423
525
629
737
847
949
1053
1161
1271
1379
14101
15103
16125
17149
18167
19169
20173
21181
22191
23197
24199
25239
26263
27269
28271
29293
30311
31317
32343
33349
34359
35367
36373
37383
38389
39421
40461
41463
42479
43487
44503
45509
46529
47541
48557
49599
50607
51613
52625
53647
54653
55661

[5,7,13,23,25,29,37,47,49,53,61,71,79,101,103,125,
 149,167,169,173,181,191,197,199,239,263,269,271,
 293,311,317,343,349,359,367,373,383,389,421,461,
 463,479,487,503,509,529,541,557,599,607,613,625,
 647,653,661]