# A058872 (b-file synthesized from sequence entry)
1 0
2 2
3 12
4 80
5 720
6 9152
7 165312
8 4244480
9 154732800
10 8005686272
11 587435092992
12 61116916981760
13 9011561121239040
14 1882834327457349632
15 557257804202631217152
16 233610656002563147038720
17 138681207656726645785559040
18 116575238610106596799428165632