# A159952 (b-file synthesized from sequence entry)
1 0
2 1
3 2
4 10
5 11
6 12
7 20
8 21
9 22
10 100
11 101
12 102
13 110
14 111
15 112
16 120
17 121
18 122
19 200
20 201
21 202
22 210
23 211
24 212
25 220
26 221
27 1000
28 1001
29 1002
30 1010
31 1011
32 1012
33 1020
34 1021
35 1022
36 1100
37 1101
38 1102
39 1110
40 1111
41 1112
42 1120
43 1121
44 1122
45 1200
46 1201
47 1202
48 1210
49 1211
50 1212