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A084127 as a simple table

na(n)
12
23
33
45
57
65
77
811
95
1013
1111
1217
137
1419
1513
1623
177
1817
1911
2019
2129
2231
2313
2423
2537
2611
2741
2817
2943
3029
3113
3231
3347
3419
3553
3637
3723
3859
3917
4011
4161
4241
4343
4419
4567
4647
4771
4813
4929
5073
5131
5279
5353
5423
5583
5613
5759
5889
5961
6037
6117
6297
6367
64101
6529
6641
67103
6819
6971
70107
7143
7231

[2,3,3,5,7,5,7,11,5,13,11,17,7,19,13,23,7,17,11,
 19,29,31,13,23,37,11,41,17,43,29,13,31,47,19,53,
 37,23,59,17,11,61,41,43,19,67,47,71,13,29,73,31,
 79,53,23,83,13,59,89,61,37,17,97,67,101,29,41,103,
 19,71,107,43,31]