# A362992 (b-file synthesized from sequence entry)
0 1
1 2
2 18
3 192
4 7500
5 77760
6 7058940
7 220200960
8 12053081880
9 252000000000
10 65362309994520
11 1716349336289280
12 645822919595173320
13 20430218263561666560
14 701330854833984375000
15 51933349175015422033920
16 35071094208630625451626320
17 1487906280482935955379978240