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A137925 as a simple table

na(n)
11
21
33
44
51
61
71
88
99
105
1111
124
1313
147
153
161
1717
189
1919
205
217
2211
2323
241
2525
262
2727
281
2929
302
3131
321
3333
3417
3535
369
3737
3838
3939
4040
4141
427
4343
4444
4545
4646
4747
483
4949
501
5117
5213
5353
5427
555
567
5757
5858
5959
605
6161
6231
637
641
6513
6666
6767
6868
6969
7014
7171
729
7373
7437
7525
7619
7711
7839
7979
801
811

[1,1,3,4,1,1,1,8,9,5,11,4,13,7,3,1,17,9,19,5,7,11,
 23,1,25,2,27,1,29,2,31,1,33,17,35,9,37,38,39,40,
 41,7,43,44,45,46,47,3,49,1,17,13,53,27,5,7,57,58,
 59,5,61,31,7,1,13,66,67,68,69,14,71,9,73,37,25,19,
 11,39,79,1,1]