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A130371 as a simple table

na(n)
00
11
22
33
44
55
66
78
87
99
1010
1111
1212
1313
1414
1515
1616
1720
1821
1919
2022
2118
2217
2323
2424
2525
2627
2726
2828
2929
3030
3131
3232
3333
3434
3535
3636
3737
3838
3939
4040
4141
4242
4343
4444
4555
4654
4747
4857
4958
5059
5151
5252
5353
5461
5562
5656
5763
5848
5949
6060
6164
6250
6346
6445
6565
6666
6767
6868
6969
7070
7171

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