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A127355 as a simple table

na(n)
13
27
317
423
571
6101
7103
8107
9109
10113
11127
12131
13137
14173
15199
16223
17233
18271
19311
20313
21317
22331
23359
24367
25409
26479
27499
28593
29673
30677
31701
32709
33773
34797
35907
36919
37929
38947
39953
40977
41991
421009
431123
441129
451193
461213
471217
481223
491231
501277
511291

[3,7,17,23,71,101,103,107,109,113,127,131,137,173,
 199,223,233,271,311,313,317,331,359,367,409,479,
 499,593,673,677,701,709,773,797,907,919,929,947,
 953,977,991,1009,1123,1129,1193,1213,1217,1223,
 1231,1277,1291]