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A064429 as a simple table

na(n)
00
12
21
33
45
54
66
78
87
99
1011
1110
1212
1314
1413
1515
1617
1716
1818
1920
2019
2121
2223
2322
2424
2526
2625
2727
2829
2928
3030
3132
3231
3333
3435
3534
3636
3738
3837
3939
4041
4140
4242
4344
4443
4545
4647
4746
4848
4950
5049
5151
5253
5352
5454
5556
5655
5757
5859
5958
6060
6162
6261
6363
6465
6564
6666
6768
6867
6969
7071
7170

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