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A032758 as a simple table

na(n)
12
23
35
47
513
617
719
823
929
1031
1137
1241
1343
1447
1553
1659
1761
1867
1971
2073
2179
2283
2389
2497
25101
26131
27151
28181
29191
30313
31353
32373
33383
34727
35757
36787
37797
38919
39929
4018181
4132323
4235353
4372727
4474747
4578787
4694949
4795959
481212121
491616161
50323232323
51383838383

[2,3,5,7,13,17,19,23,29,31,37,41,43,47,53,59,61,
 67,71,73,79,83,89,97,101,131,151,181,191,313,353,
 373,383,727,757,787,797,919,929,18181,32323,35353,
 72727,74747,78787,94949,95959,1212121,1616161,
 323232323,383838383]