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A123719 as a simple table

na(n)
00
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1515
1616
1717
1821
1919
2020
2118
2222
2323
2424
2525
2626
2727
2828
2929
3030
3131
3235
3333
3434
3532
3636
3737
3838
3939
4040
4141
4242
4343
4444
4545
4658
4756
4854
4949
5063
5151
5252
5353
5448
5562
5647
5757
5846
5959
6060
6161
6255
6350
6464
6565
6666
6767
6868
6969
7070
7171

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