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A278785 as a simple table

na(n)
17
217
319
429
531
637
747
853
961
1067
1179
1283
13107
14127
15137
16157
17173
18179
19193
20199
21211
22229
23271
24277
25307
26331
27359
28379
29409
30419
31421
32433
33439
34443
35499
36503
37509
38523
39547
40571
41587
42619
43631
44653
45673
46677
47701
48709
49719
50727
51739
52751
53787
54823

[7,17,19,29,31,37,47,53,61,67,79,83,107,127,137,
 157,173,179,193,199,211,229,271,277,307,331,359,
 379,409,419,421,433,439,443,499,503,509,523,547,
 571,587,619,631,653,673,677,701,709,719,727,739,
 751,787,823]