# A273935 (b-file synthesized from sequence entry)
0 1
1 1
2 6
3 84
4 2160
5 89280
6 5443200
7 460857600
8 51819264000
9 7476605337600
10 1347105779712000
11 296508121620480000
12 78297264318873600000
13 24431729220414996480000
14 8893692297263669575680000
15 3735464765667589501747200000
16 1793050447716486548029440000000