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A040980 as a simple table

na(n)
12
23
35
47
513
617
719
823
929
1037
1143
1247
1353
1459
1567
1673
1779
1883
1989
2097
21103
22107
23109
24113
25127
26131
27137
28139
29149
30157
31163
32167
33173
34179
35193
36197
37199
38223
39227
40229
41233
42239
43257
44263
45269
46277
47283
48293

[2,3,5,7,13,17,19,23,29,37,43,47,53,59,67,73,79,
 83,89,97,103,107,109,113,127,131,137,139,149,157,
 163,167,173,179,193,197,199,223,227,229,233,239,
 257,263,269,277,283,293]