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A331187 as a simple table

na(n)
11
21
31
41
51
63
71
88
91
102
111
123
131
142
1515
161
171
182
191
204
2121
2222
231
243
251
2626
2727
284
291
3010
311
3232
3333
3434
3535
369
371
3838
3939
408
411
426
431
4444
4545
4646
471
483
491
5050
5151
5252
531
5454
5555
5656
5757
5858
591
6015
611
6262
6363
641
6565
6666
671
6868
6969
7070
711
728
731
7474
7575
7676
7777
7878
791
8080
811
8282
831
8484
8585
8686
8787
8888
891
9090

[1,1,1,1,1,3,1,8,1,2,1,3,1,2,15,1,1,2,1,4,21,22,1,
 3,1,26,27,4,1,10,1,32,33,34,35,9,1,38,39,8,1,6,1,
 44,45,46,1,3,1,50,51,52,1,54,55,56,57,58,1,15,1,
 62,63,1,65,66,1,68,69,70,1,8,1,74,75,76,77,78,1,
 80,1,82,1,84,85,86,87,88,1,90]