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A074685 as a simple table

na(n)
00
11
23
32
46
57
68
75
84
915
1014
1116
1217
1318
1419
1520
1621
1711
1812
1922
2013
2110
229
2339
2440
2541
2638
2737
2843
2942
3044
3145
3246
3347
3448
3549
3650
3752
3851
3953
4054
4155
4256
4357
4458
4529
4628
4759
4830
4931
5032
5160
5261
5362
5433
5534
5663
5735
5825
5926
6064
6136
6227
6324
6423
65113
66112
67114
68115
69116

[0,1,3,2,6,7,8,5,4,15,14,16,17,18,19,20,21,11,12,
 22,13,10,9,39,40,41,38,37,43,42,44,45,46,47,48,49,
 50,52,51,53,54,55,56,57,58,29,28,59,30,31,32,60,
 61,62,33,34,63,35,25,26,64,36,27,24,23,113,112,
 114,115,116]