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A026261 as a simple table

na(n)
11
21
32
42
53
63
74
84
95
106
115
127
136
148
157
169
178
1810
1911
209
2112
2210
2313
2411
2514
2612
2715
2816
2913
3017
3114
3218
3315
3419
3516
3620
3721
3817
3922
4018
4123
4219
4324
4420
4525
4621
4726
4827
4922
5028
5123
5229
5324
5430
5525
5631
5732
5826
5933
6027
6134
6228
6335
6429
6536
6637

[1,1,2,2,3,3,4,4,5,6,5,7,6,8,7,9,8,10,11,9,12,10,
 13,11,14,12,15,16,13,17,14,18,15,19,16,20,21,17,
 22,18,23,19,24,20,25,21,26,27,22,28,23,29,24,30,
 25,31,32,26,33,27,34,28,35,29,36,37]