# A253091 (b-file synthesized from sequence entry)
0 1
1 12
2 111
3 1002
4 12021
5 111222
6 1001001
7 12012012
8 111111111
9 1000000002
10 12000000021
11 111000000222
12 1002000002001
13 12021000021012
14 111222000222111
15 1001001002002002
16 12012012021021021
17 111111111222222222
18 1000000001000000001
19 12000000012000000012
20 111000000111000000111