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A053028 as a simple table

na(n)
15
213
317
437
553
661
773
889
997
10109
11113
12137
13149
14157
15173
16193
17197
18233
19257
20269
21277
22293
23313
24317
25337
26353
27373
28389
29397
30421
31433
32457
33557
34577
35593
36613
37617
38653
39661
40673
41677
42701
43733
44757
45761
46773
47797
48821
49829
50853
51857
52877
53937
54953

[5,13,17,37,53,61,73,89,97,109,113,137,149,157,
 173,193,197,233,257,269,277,293,313,317,337,353,
 373,389,397,421,433,457,557,577,593,613,617,653,
 661,673,677,701,733,757,761,773,797,821,829,853,
 857,877,937,953]