# A058251 (b-file synthesized from sequence entry)
0 1
1 2
2 6
3 120
4 1680
5 36960
6 5765760
7 1568286720
8 536354058240
9 24672286679040
10 2861985254768640
11 2661646286934835200
12 3545312854197200486400
13 5814313080883408797696000
14 10500649424075436288638976000