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A064895 as a simple table

na(n)
00
11
22
33
42
53
66
77
82
93
1010
1111
1212
1313
1414
1515
162
173
1818
1919
206
217
2222
2323
2424
2525
2626
2727
2828
2929
3030
3131
322
333
3434
3535
3636
3737
3838
3939
4040
4141
4242
4343
4444
4545
4646
4747
4848
4949
5050
5151
5252
5353
5454
5555
5656
5757
5858
5959
6060
6161
6262
6363
642
653
6666
6767
6810
6911
7070
7171
726
737
7474
7575

[0,1,2,3,2,3,6,7,2,3,10,11,12,13,14,15,2,3,18,19,
 6,7,22,23,24,25,26,27,28,29,30,31,2,3,34,35,36,37,
 38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,
 54,55,56,57,58,59,60,61,62,63,2,3,66,67,10,11,70,
 71,6,7,74,75]