# A006903 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 10
4 3360
5 1829520
6 2010023400
7 3622767548400
8 9820308795897600
9 38117776055769009600
10 204209112522362230483200
11 1465227517158776390187168000
12 13730711637579303579659695248000