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A174239 as a simple table

na(n)
01
10
23
31
45
52
67
73
89
94
1011
115
1213
136
1415
157
1617
178
1819
199
2021
2110
2223
2311
2425
2512
2627
2713
2829
2914
3031
3115
3233
3316
3435
3517
3637
3718
3839
3919
4041
4120
4243
4321
4445
4522
4647
4723
4849
4924
5051
5125
5253
5326
5455
5527
5657
5728
5859
5929
6061
6130
6263
6331
6465
6532
6667
6733
6869
6934
7071
7135
7273
7336
7475
7537
7677
7738
7879
7939
8081

[1,0,3,1,5,2,7,3,9,4,11,5,13,6,15,7,17,8,19,9,21,
 10,23,11,25,12,27,13,29,14,31,15,33,16,35,17,37,
 18,39,19,41,20,43,21,45,22,47,23,49,24,51,25,53,
 26,55,27,57,28,59,29,61,30,63,31,65,32,67,33,69,
 34,71,35,73,36,75,37,77,38,79,39,81]