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A216777 as a simple table

na(n)
15
27
313
417
523
629
731
837
941
1047
1153
1261
1371
1473
1579
1689
1797
18101
19103
20109
21113
22127
23137
24149
25151
26157
27167
28173
29181
30191
31193
32197
33199
34223
35229
36233
37239
38241
39257
40263
41269
42271
43277
44293
45311
46313
47317
48337
49349
50353
51359
52367
53373
54383
55389

[5,7,13,17,23,29,31,37,41,47,53,61,71,73,79,89,97,
 101,103,109,113,127,137,149,151,157,167,173,181,
 191,193,197,199,223,229,233,239,241,257,263,269,
 271,277,293,311,313,317,337,349,353,359,367,373,
 383,389]