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A249373 as a simple table

na(n)
13
27
311
413
517
619
723
829
931
1037
1141
1243
1347
1453
1559
1661
1767
1871
1973
2079
2183
2289
2397
24107
25109
26113
27127
28131
29137
30139
31149
32151
33163
34167
35173
36179
37191
38193
39197
40211
41223
42229
43233
44239
45241
46257
47263
48269
49277
50281
51283
52293
53313

[3,7,11,13,17,19,23,29,31,37,41,43,47,53,59,61,67,
 71,73,79,83,89,97,107,109,113,127,131,137,139,149,
 151,163,167,173,179,191,193,197,211,223,229,233,
 239,241,257,263,269,277,281,283,293,313]