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A022290 as a simple table

na(n)
00
11
22
33
43
54
65
76
85
96
107
118
128
139
1410
1511
168
179
1810
1911
2011
2112
2213
2314
2413
2514
2615
2716
2816
2917
3018
3119
3213
3314
3415
3516
3616
3717
3818
3919
4018
4119
4220
4321
4421
4522
4623
4724
4821
4922
5023
5124
5224
5325
5426
5527
5626
5727
5828
5929
6029
6130
6231
6332
6421
6522
6623
6724
6824
6925
7026

[0,1,2,3,3,4,5,6,5,6,7,8,8,9,10,11,8,9,10,11,11,
 12,13,14,13,14,15,16,16,17,18,19,13,14,15,16,16,
 17,18,19,18,19,20,21,21,22,23,24,21,22,23,24,24,
 25,26,27,26,27,28,29,29,30,31,32,21,22,23,24,24,
 25,26]