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A118577 as a simple table

na(n)
11
21
32
43
54
65
74
86
98
109
115
128
136
1411
157
166
1716
1817
199
2013
2111
2219
2313
2411
2515
2618
2723
2817
2914
3026
3128
3214
3332
3433
3519
3626
3720
3833
3921
4015
4123
4229
4337
4426
4518
4640
4741
4819
4928
5047
5137
5246
5347
5450
5549
5650
5737
5825
5955
6057
6133
6235
6334
6434
6564
6665
6739
6851
6941
7057
7143
7231
7345
7454
7561

[1,1,2,3,4,5,4,6,8,9,5,8,6,11,7,6,16,17,9,13,11,
 19,13,11,15,18,23,17,14,26,28,14,32,33,19,26,20,
 33,21,15,23,29,37,26,18,40,41,19,28,47,37,46,47,
 50,49,50,37,25,55,57,33,35,34,34,64,65,39,51,41,
 57,43,31,45,54,61]