A140267 - OEIS

A140267 as a simple table

n	a(n)
0	0
1	1
2	12
3	10
4	11
5	122
6	120
7	121
8	102
9	100
10	101
11	112
12	110
13	111
14	1222
15	1220
16	1221
17	1202
18	1200
19	1201
20	1212
21	1210
22	1211
23	1022
24	1020
25	1021
26	1002
27	1000
28	1001
29	1012
30	1010
31	1011
32	1122
33	1120
34	1121
35	1102
36	1100
37	1101
38	1112
39	1110
40	1111
41	12222
42	12220
43	12221

[0,1,12,10,11,122,120,121,102,100,101,112,110,111, 1222,1220,1221,1202,1200,1201,1212,1210,1211,1022, 1020,1021,1002,1000,1001,1012,1010,1011,1122,1120, 1121,1102,1100,1101,1112,1110,1111,12222,12220, 12221]