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A276981 as a simple table

na(n)
10
21
30
41
51
62
70
81
90
101
114
121
133
142
156
164
175
181
192
204
210
221
231
240
251
2610
271
2810
294
301
3110
329
3312
343
354
361
3710
382
396
404
4112
428
431
4410
451
4610
474
488
490
501
5110
5215
5314
544
556
569
575
5816
597
602
613
6213
6311
648
6512
661
6710
681
6910
705
7112
726
733
7411
7515
7617
7718
789
7914
807
8113
8216
838
844
852

[0,1,0,1,1,2,0,1,0,1,4,1,3,2,6,4,5,1,2,4,0,1,1,0,
 1,10,1,10,4,1,10,9,12,3,4,1,10,2,6,4,12,8,1,10,1,
 10,4,8,0,1,10,15,14,4,6,9,5,16,7,2,3,13,11,8,12,1,
 10,1,10,5,12,6,3,11,15,17,18,9,14,7,13,16,8,4,2]