(Translated by https://www.hiragana.jp/)
A269597 - OEIS
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A269597 as a simple table

na(n)
11
22
33
44
55
64
76
88
97
109
116
1210
138
147
1510
1611
179
1812
1913
2010
219
2214
2312
2415
2511
2616
2713
2815
2912
3016
3111
3214
3310
3417
3518
3615
3719
3817
3914
4020
4113
4212
4321
4416
4518
4622
4717
4824
4916
5020
5115
5222
5325
5419
5526
5623
5721
5818
5927
6028

[1,2,3,4,5,4,6,8,7,9,6,10,8,7,10,11,9,12,13,10,9,
 14,12,15,11,16,13,15,12,16,11,14,10,17,18,15,19,
 17,14,20,13,12,21,16,18,22,17,24,16,20,15,22,25,
 19,26,23,21,18,27,28]