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A059981 as a simple table

na(n)
11
21
31
42
51
62
71
82
93
102
111
123
131
142
153
164
171
183
191
202
214
222
231
243
254
265
272
284
291
302
311
323
335
343
352
364
371
385
396
403
411
425
431
442
453
462
471
484
496
504
513
525
531
542
556
567
574
582
591
606
611
622
633
644
653
662
671
685
697
705
711
724
731
746
752
763
777
788
791
805
813
822
831
847
852
863
874

[1,1,1,2,1,2,1,2,3,2,1,3,1,2,3,4,1,3,1,2,4,2,1,3,
 4,5,2,4,1,2,1,3,5,3,2,4,1,5,6,3,1,5,1,2,3,2,1,4,6,
 4,3,5,1,2,6,7,4,2,1,6,1,2,3,4,3,2,1,5,7,5,1,4,1,6,
 2,3,7,8,1,5,3,2,1,7,2,3,4]