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A154440 as a simple table

na(n)
00
11
22
33
44
55
67
76
88
99
1010
1111
1214
1315
1412
1513
1616
1717
1818
1919
2020
2121
2222
2323
2428
2529
2631
2730
2824
2925
3026
3127
3232
3333
3434
3535
3636
3737
3838
3939
4040
4141
4242
4343
4444
4545
4646
4747
4856
4957
5058
5159
5262
5363
5460
5561
5648
5749
5850
5951
6052
6153
6254
6355
6464
6565
6666
6767
6868
6969
7070
7171

[0,1,2,3,4,5,7,6,8,9,10,11,14,15,12,13,16,17,18,
 19,20,21,22,23,28,29,31,30,24,25,26,27,32,33,34,
 35,36,37,38,39,40,41,42,43,44,45,46,47,56,57,58,
 59,62,63,60,61,48,49,50,51,52,53,54,55,64,65,66,
 67,68,69,70,71]