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A233280 as a simple table

na(n)
00
11
22
33
44
55
67
76
88
99
1011
1110
1214
1315
1413
1512
1616
1717
1819
1918
2022
2123
2221
2320
2428
2529
2631
2730
2826
2927
3025
3124
3232
3333
3435
3534
3638
3739
3837
3936
4044
4145
4247
4346
4442
4543
4641
4740
4856
4957
5059
5158
5262
5363
5461
5560
5652
5753
5855
5954
6050
6151
6249
6348
6464
6565
6667
6766

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