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A191040 as a simple table

na(n)
13
27
311
413
529
637
741
843
947
1053
1161
1271
1383
1497
15103
16113
17139
18179
19181
20191
21193
22197
23229
24233
25251
26257
27269
28277
29281
30311
31331
32347
33359
34389
35431
36439
37461
38479
39491
40499
41503
42509
43521
44523
45557
46571
47577
48587
49593
50599
51607
52613
53617
54619
55643

[3,7,11,13,29,37,41,43,47,53,61,71,83,97,103,113,
 139,179,181,191,193,197,229,233,251,257,269,277,
 281,311,331,347,359,389,431,439,461,479,491,499,
 503,509,521,523,557,571,577,587,593,599,607,613,
 617,619,643]