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A089591 as a simple table

na(n)
00
11
210
311
420
5101
6110
7111
8120
9201
10210
111011
121020
131101
141110
151111
161120
171201
181210
192011
202020
212101
222110
2310111
2410120
2510201
2610210
2711011
2811020
2911101
3011110
3111111
3211120
3311201
3411210
3512011
3612020
3712101
3812110
3920111

[0,1,10,11,20,101,110,111,120,201,210,1011,1020,
 1101,1110,1111,1120,1201,1210,2011,2020,2101,2110,
 10111,10120,10201,10210,11011,11020,11101,11110,
 11111,11120,11201,11210,12011,12020,12101,12110,
 20111]