# A178005 (b-file synthesized from sequence entry)
1 7
2 97
3 977
4 7877
5 97777
6 787777
7 7877777
8 77767777
9 787777777
10 8777777777
11 79777777777
12 777777779777
13 7877777777777
14 77777779777777
15 778777777777777
16 8777777777777777
17 77797777777777777
18 797777777777777777