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A051176 as a simple table

na(n)
00
11
22
31
44
55
62
77
88
93
1010
1111
124
1313
1414
155
1616
1717
186
1919
2020
217
2222
2323
248
2525
2626
279
2828
2929
3010
3131
3232
3311
3434
3535
3612
3737
3838
3913
4040
4141
4214
4343
4444
4515
4646
4747
4816
4949
5050
5117
5252
5353
5418
5555
5656
5719
5858
5959
6020
6161
6262
6321
6464
6565
6622
6767

[0,1,2,1,4,5,2,7,8,3,10,11,4,13,14,5,16,17,6,19,
 20,7,22,23,8,25,26,9,28,29,10,31,32,11,34,35,12,
 37,38,13,40,41,14,43,44,15,46,47,16,49,50,17,52,
 53,18,55,56,19,58,59,20,61,62,21,64,65,22,67]