# A177952 (b-file synthesized from sequence entry)
1 0
2 0
3 7
4 13
5 86
6 293
7 1212
8 4699
9 17380
10 60623
11 203799
12 664953
13 2135649
14 6800449
15 21572602
16 68311990
17 216144075
18 683666674