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A028416 as a simple table

na(n)
17
211
313
417
519
623
729
847
959
1061
1173
1289
1397
14101
15103
16109
17113
18127
19131
20137
21139
22149
23157
24167
25179
26181
27193
28197
29211
30223
31229
32233
33241
34251
35257
36263
37269
38281
39293
40313
41331
42337
43349
44353
45367
46373
47379
48383
49389
50401
51409
52419
53421
54433

[7,11,13,17,19,23,29,47,59,61,73,89,97,101,103,
 109,113,127,131,137,139,149,157,167,179,181,193,
 197,211,223,229,233,241,251,257,263,269,281,293,
 313,331,337,349,353,367,373,379,383,389,401,409,
 419,421,433]