# A085990 (b-file synthesized from sequence entry)
1 0
2 3
3 60
4 2520
5 181440
6 19958400
7 3113510400
8 653837184000
9 177843714048000
10 60822550204416000
11 25545471085854720000
12 12926008369442488320000
13 7755605021665492992000000
14 5444434725209176080384000000
15 4420880996869850977271808000000