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A260298 as a simple table

na(n)
12
23
37
447
559
679
783
8103
9107
10127
11139
12191
13199
14211
15251
16263
17283
18307
19331
20367
21379
22383
23431
24467
25479
26499
27503
28547
29587
30599
31607
32631
33643
34659
35727
36743
37811
38823
39827
40839
41859
42863
43883
44887
45907
46971
47991
481087
491151
501163
511171
521259
531283

[2,3,7,47,59,79,83,103,107,127,139,191,199,211,
 251,263,283,307,331,367,379,383,431,467,479,499,
 503,547,587,599,607,631,643,659,727,743,811,823,
 827,839,859,863,883,887,907,971,991,1087,1151,
 1163,1171,1259,1283]