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A031157 as a simple table

na(n)
13
27
313
431
537
643
767
873
979
10127
11151
12163
13193
14211
15223
16241
17283
18307
19331
20349
21367
22409
23421
24433
25463
26487
27541
28577
29601
30613
31619
32631
33643
34673
35727
36739
37769
38787
39823
40883
41937
42991
43997
441009
451021
461039
471087
481093
491117
501123

[3,7,13,31,37,43,67,73,79,127,151,163,193,211,223,
 241,283,307,331,349,367,409,421,433,463,487,541,
 577,601,613,619,631,643,673,727,739,769,787,823,
 883,937,991,997,1009,1021,1039,1087,1093,1117,
 1123]