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A342916 as a simple table

na(n)
12
21
31
45
51
67
71
83
95
1011
111
1213
131
145
152
1617
171
1819
191
207
2111
2223
231
2425
2513
269
277
2829
291
3031
311
3211
3317
3435
353
3637
371
3813
395
4041
411
4243
431
445
4523
4647
471
4849
4925
5017
5113
5253
531
5455
557
5619
5729
5859
591
6061
611
6221
632
6465
6511
6667
671
6823
6935
7071
711
7273
731
7425
7519
7677
7713
7879
791
809
8141
8283
831
8485
8543
8629
8711
8889
891
9091
9123
9231

[2,1,1,5,1,7,1,3,5,11,1,13,1,5,2,17,1,19,1,7,11,
 23,1,25,13,9,7,29,1,31,1,11,17,35,3,37,1,13,5,41,
 1,43,1,5,23,47,1,49,25,17,13,53,1,55,7,19,29,59,1,
 61,1,21,2,65,11,67,1,23,35,71,1,73,1,25,19,77,13,
 79,1,9,41,83,1,85,43,29,11,89,1,91,23,31]