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A012884 as a simple table

na(n)
11
22
33
45
57
611
713
817
923
1031
1137
1253
1371
1473
15113
16131
17137
18173
19197
20311
21313
22317
23373
24797
251373
261997
273137
283797
297331
3073331
31739397

[1,2,3,5,7,11,13,17,23,31,37,53,71,73,113,131,137,
 173,197,311,313,317,373,797,1373,1997,3137,3797,
 7331,73331,739397]