# A334735 (b-file synthesized from sequence entry)
1 1
2 4
3 18
4 96
5 2880
6 518400
7 181440
8 135475200
9 8778792960
10 376233984000
11 72425041920000
12 4588850656051200
13 47345284546560000
14 217144413044342784000
15 42750306318104985600000
16 4974581098834034688000000
17 70875936417673484697600000
18 13663463022599094380003328000000