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A093074 as a simple table

na(n)
12
23
33
45
55
67
77
87
95
1011
1111
1213
1313
1413
157
1617
1717
1819
1919
2019
2111
2223
2323
2423
2513
2613
2713
2829
2929
3031
3131
3231
3317
3417
3517
3637
3737
3837
3919
4041
4141
4243
4343
4443
4523
4647
4747
4847
497
5017
5117
5253
5353
5453
5511
5619
5729
5859
5959
6061
6161
6261
6331
6413
6513
6667
6767
6867
6923
7071
7171
7273

[2,3,3,5,5,7,7,7,5,11,11,13,13,13,7,17,17,19,19,
 19,11,23,23,23,13,13,13,29,29,31,31,31,17,17,17,
 37,37,37,19,41,41,43,43,43,23,47,47,47,7,17,17,53,
 53,53,11,19,29,59,59,61,61,61,31,13,13,67,67,67,
 23,71,71,73]