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A100807 as a simple table

na(n)
13
27
313
417
519
623
729
831
937
1041
1143
1247
1353
1461
1571
1673
1779
1883
1989
2097
21103
22107
23113
24127
25137
26139
27149
28157
29163
30167
31173
32181
33191
34223
35229
36233
37239
38241
39251
40271
41281
42283
43293
44307
45317
46337
47347
48349
49359
50373
51379
52383
53389
54409
55419
56421
57431

[3,7,13,17,19,23,29,31,37,41,43,47,53,61,71,73,79,
 83,89,97,103,107,113,127,137,139,149,157,163,167,
 173,181,191,223,229,233,239,241,251,271,281,283,
 293,307,317,337,347,349,359,373,379,383,389,409,
 419,421,431]