# A052727 (b-file synthesized from sequence entry)
0 0
1 1
2 4
3 24
4 288
5 4800
6 103680
7 2741760
8 85800960
9 3100446720
10 127037030400
11 5819550105600
12 294727768473600
13 16350861400473600
14 986127353590579200
15 64238655955009536000
16 4495021381191204864000
17 336249161369543245824000