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A087187 as a simple table

na(n)
10
20
30
40
50
60
70
81
90
100
111
121
131
141
150
161
172
181
192
201
211
222
232
243
251
263
272
282
293
301
313
323
333
343
353
364
374
384
393
403
414
423
434
444
453
465
475
485
494
505
514
525
536
545
555
565
576
585
597
605
617
626
636
646
655
666
676
688
696
707
717
728
737
749
756
768
777
787
798
807
818
828
839
848
858
868
8710
888
8912
908
9110
9210
939
9410
958
9610
979
9810
999

[0,0,0,0,0,0,0,1,0,0,1,1,1,1,0,1,2,1,2,1,1,2,2,3,
 1,3,2,2,3,1,3,3,3,3,3,4,4,4,3,3,4,3,4,4,3,5,5,5,4,
 5,4,5,6,5,5,5,6,5,7,5,7,6,6,6,5,6,6,8,6,7,7,8,7,9,
 6,8,7,7,8,7,8,8,9,8,8,8,10,8,12,8,10,10,9,10,8,10,
 9,10,9]