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A058977 as a simple table

na(n)
12
23
32
45
57
67
72
83
93
1011
117
1213
1311
144
152
1617
177
1819
193
205
214
2223
237
245
2517
263
2711
2829
2913
3031
312
327
335
346
357
3637
3723
388
393
4041
414
4243
434
444
453
4647
477
487
493
5010
5117
5253
537
548
5511
5611
577
5859
5913
6061
616
625
632
649
6519
6667
675
6813
6917
7071
717
7273
7341
744
7523
769
776
7879
793
803
814
8283
834
8411
8547

[2,3,2,5,7,7,2,3,3,11,7,13,11,4,2,17,7,19,3,5,4,
 23,7,5,17,3,11,29,13,31,2,7,5,6,7,37,23,8,3,41,4,
 43,4,4,3,47,7,7,3,10,17,53,7,8,11,11,7,59,13,61,6,
 5,2,9,19,67,5,13,17,71,7,73,41,4,23,9,6,79,3,3,4,
 83,4,11,47]