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A216731 as a simple table

na(n)
15
27
317
419
523
641
743
847
953
1059
1161
1267
1371
1473
1579
16127
17131
18137
19139
20149
21151
22157
23163
24167
25173
26179
27181
28191
29193
30197
31199
32211
33223
34227
35229
36233
37239
38241
39367
40373
41379
42383
43389
44397
45401
46409
47419
48421
49431
50433
51439
52443
53449
54457
55461
56463
57467
58479
59487
60491
61499
62503
63509

[5,7,17,19,23,41,43,47,53,59,61,67,71,73,79,127,
 131,137,139,149,151,157,163,167,173,179,181,191,
 193,197,199,211,223,227,229,233,239,241,367,373,
 379,383,389,397,401,409,419,421,431,433,439,443,
 449,457,461,463,467,479,487,491,499,503,509]