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A279857 as a simple table

na(n)
15
213
317
429
537
641
753
859
961
1071
1173
1279
1383
1489
1597
16101
17103
18107
19109
20113
21127
22131
23137
24139
25149
26151
27163
28167
29179
30181
31191
32197
33199
34211
35223
36227
37229
38233
39239
40251
41269
42271
43281

[5,13,17,29,37,41,53,59,61,71,73,79,83,89,97,101,
 103,107,109,113,127,131,137,139,149,151,163,167,
 179,181,191,197,199,211,223,227,229,233,239,251,
 269,271,281]