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A165815 as a simple table

na(n)
15
27
313
423
529
631
737
841
947
1053
1161
1271
1379
14101
15103
16109
17127
18137
19149
20151
21157
22167
23173
24181
25191
26197
27199
28223
29229
30239
31257
32263
33269
34271
35277
36293
37311
38313
39317
40349
41353
42359
43367
44373
45383
46389
47397
48421
49431
50439
51457
52461
53463
54479
55487

[5,7,13,23,29,31,37,41,47,53,61,71,79,101,103,109,
 127,137,149,151,157,167,173,181,191,197,199,223,
 229,239,257,263,269,271,277,293,311,313,317,349,
 353,359,367,373,383,389,397,421,431,439,457,461,
 463,479,487]