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A216753 as a simple table

na(n)
15
27
313
417
523
629
731
837
941
1047
1153
1261
1367
1471
1579
1689
1797
18101
19103
20109
21127
22137
23149
24151
25157
26167
27173
28181
29191
30193
31197
32199
33223
34229
35239
36241
37263
38269
39271
40277
41293
42311
43313
44317
45349
46353
47359
48367
49373
50383
51389
52397
53401
54409
55419

[5,7,13,17,23,29,31,37,41,47,53,61,67,71,79,89,97,
 101,103,109,127,137,149,151,157,167,173,181,191,
 193,197,199,223,229,239,241,263,269,271,277,293,
 311,313,317,349,353,359,367,373,383,389,397,401,
 409,419]