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A087941 as a simple table

na(n)
10
20
31
43
57
64
74
86
97
109
117
128
138
146
159
169
177
187
196
2010
219
2210
235
249
2510
265
278
2810
2913
308
3115
327
336
3413
358
367
378
3814
3913
4013
4111
4211
437
4411
4510
468
4711
485
4911
5012
5114
526
5316
5414
5515
5615
5712
589
597
607
6113
6211
6310
6412
6512
6610
6713
6811
697
7014
7114
7213
7314
7410
7513

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