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A076974 as a simple table

na(n)
12
23
37
413
519
625
731
839
943
1049
1155
1261
1369
1473
1581
1685
1791
1899
19103
20109
21115
22123
23129
24133
25139
26147
27151
28159
29165
30169
31175
32181
33187
34193
35199
36207
37213
38225
39229
40235
41241
42253
43259
44265
45271
46279
47283
48291
49295
50309
51313
52319
53333
54337
55349
56355

[2,3,7,13,19,25,31,39,43,49,55,61,69,73,81,85,91,
 99,103,109,115,123,129,133,139,147,151,159,165,
 169,175,181,187,193,199,207,213,225,229,235,241,
 253,259,265,271,279,283,291,295,309,313,319,333,
 337,349,355]