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A234027 as a simple table

na(n)
00
11
23
32
44
55
67
76
815
914
1012
1113
1210
1311
149
158
1622
1723
1821
1920
2019
2118
2216
2317
2425
2524
2626
2727
2828
2929
3031
3130
3253
3352
3454
3555
3648
3749
3851
3950
4058
4159
4257
4356
4463
4562
4660
4761
4836
4937
5039
5138
5233
5332
5434
5535
5643
5742
5840
5941
6046
6147
6245
6344
6464
6565
6667
6766

[0,1,3,2,4,5,7,6,15,14,12,13,10,11,9,8,22,23,21,
 20,19,18,16,17,25,24,26,27,28,29,31,30,53,52,54,
 55,48,49,51,50,58,59,57,56,63,62,60,61,36,37,39,
 38,33,32,34,35,43,42,40,41,46,47,45,44,64,65,67,
 66]