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A028906 as a simple table

na(n)
12
23
35
47
511
631
771
891
932
1092
1131
1273
1341
1443
1574
1653
1795
1861
1976
2071
2173
2297
2383
2498
2597
26110
27310
28710
29910
30311
31721
32311
33731
34931
35941
36511
37751
38631
39761
40731
41971
42811
43911
44931
45971
46991
47211
48322
49722
50922
51332
52932
53421
54521

[2,3,5,7,11,31,71,91,32,92,31,73,41,43,74,53,95,
 61,76,71,73,97,83,98,97,110,310,710,910,311,721,
 311,731,931,941,511,751,631,761,731,971,811,911,
 931,971,991,211,322,722,922,332,932,421,521]