# A119699 (b-file synthesized from sequence entry)
0 0
1 2
2 24
3 720
4 10080
5 157500
6 2128896
7 28420392
8 363242880
9 4552582320
10 55888690000
11 676114951512
12 8074566549504
13 95423851304600
14 1117539519314400
15 12986826568200000
16 149901793906152960
17 1720026938417810220
18 19632840460239283200
19 223048221338080399800