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A126974 as a simple table

na(n)
10
21
32
43
54
64
75
86
96
106
117
127
138
147
159
1610
1711
188
199
2010
2110
229
2310
2412
2512
2610
2711
2811
2912
3012
3113
3214
3313
3413
3515
3613
3714
3811
3915
4016
4117
4213
4314
4414
4516
4612
4713
4816
4915
5014
5117
5216
5317
5414
5519
5618
5716
5814
5915
6017
6118
6215
6317
6419
6519
6616
6717
6818
6917
7018
7119
7219
7320
7416
7520

[0,1,2,3,4,4,5,6,6,6,7,7,8,7,9,10,11,8,9,10,10,9,
 10,12,12,10,11,11,12,12,13,14,13,13,15,13,14,11,
 15,16,17,13,14,14,16,12,13,16,15,14,17,16,17,14,
 19,18,16,14,15,17,18,15,17,19,19,16,17,18,17,18,
 19,19,20,16,20]