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A231873 as a simple table

na(n)
11
211
312
4111
5112
6121
7122
81111
91112
101121
111122
121211
131212
141221
151222
1611111
1711112
1811121
1911122
2011211
2111212
2211221
2311222
2412111
2512112
2612121
2712122
2812211
2912212
3012221
3112222

[1,11,12,111,112,121,122,1111,1112,1121,1122,1211,
 1212,1221,1222,11111,11112,11121,11122,11211,
 11212,11221,11222,12111,12112,12121,12122,12211,
 12212,12221,12222]