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A124598 as a simple table

na(n)
15
27
311
417
523
629
731
837
941
1043
1147
1253
1359
1461
1567
1671
1779
1883
1989
2097
21101
22107
23109
24127
25137
26139
27149
28151
29157
30163
31167
32173
33179
34181
35191
36193
37197
38199
39211
40227
41229
42233
43239
44241
45251
46257
47263
48269
49271
50277
51281
52283
53307
54311
55331
56337
57347

[5,7,11,17,23,29,31,37,41,43,47,53,59,61,67,71,79,
 83,89,97,101,107,109,127,137,139,149,151,157,163,
 167,173,179,181,191,193,197,199,211,227,229,233,
 239,241,251,257,263,269,271,277,281,283,307,311,
 331,337,347]