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A071159 as a simple table

na(n)
11
211
312
4111
5112
6121
7122
8123
91111
101112
111121
121122
131123
141211
151212
161221
171222
181223
191231
201232
211233
221234
2311111
2411112
2511121
2611122
2711123
2811211
2911212
3011221
3111222
3211223
3311231
3411232
3511233
3611234
3712111
3812112
3912121

[1,11,12,111,112,121,122,123,1111,1112,1121,1122,
 1123,1211,1212,1221,1222,1223,1231,1232,1233,1234,
 11111,11112,11121,11122,11123,11211,11212,11221,
 11222,11223,11231,11232,11233,11234,12111,12112,
 12121]