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A233279 as a simple table

na(n)
00
11
22
33
44
55
67
76
88
99
1011
1110
1215
1314
1412
1513
1616
1717
1819
1918
2023
2122
2220
2321
2431
2530
2628
2729
2824
2925
3027
3126
3232
3333
3435
3534
3639
3738
3836
3937
4047
4146
4244
4345
4440
4541
4643
4742
4863
4962
5060
5161
5256
5357
5459
5558
5648
5749
5851
5950
6055
6154
6252
6353
6464
6565
6667
6766

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