# A096317 (b-file synthesized from sequence entry)
1 2
2 12
3 120
4 1680
5 10080
6 221760
7 2217600
8 34594560
9 345945600
10 11762150400
11 29059430400
12 988020633600
13 21736453939200
14 225268704460800
15 5999261287219200
16 642466345122201600
17 1367831573485977600