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A089855 as a simple table

na(n)
00
11
22
33
44
55
67
78
86
99
1010
1111
1212
1313
1417
1518
1620
1721
1822
1916
2019
2114
2215
2323
2424
2525
2626
2727
2828
2929
3030
3131
3232
3333
3434
3535
3636
3745
3846
3948
4049
4150
4254
4355
4457
4558
4659
4761
4862
4963
5064
5144
5247
5353
5456
5560
5642
5751
5837
5938
6043
6152
6239
6340
6441
6565
6666
6767
6868
6969
7070
7171
7272

[0,1,2,3,4,5,7,8,6,9,10,11,12,13,17,18,20,21,22,
 16,19,14,15,23,24,25,26,27,28,29,30,31,32,33,34,
 35,36,45,46,48,49,50,54,55,57,58,59,61,62,63,64,
 44,47,53,56,60,42,51,37,38,43,52,39,40,41,65,66,
 67,68,69,70,71,72]