# A120015 (b-file synthesized from sequence entry)
1 1
2 3
3 16
4 120
5 1164
6 13965
7 200960
8 3387636
9 65644780
10 1440018822
11 35314018656
12 958109355632
13 28508766348664
14 923461269689985
15 32357613376995840
16 1219728800410342556
17 49225886778689380044
18 2118029584754948604618