# A013464 (b-file synthesized from sequence entry)
0 0
1 -4
2 0
3 -1440
4 35840
5 -7257600
6 790732800
7 -208797388800
8 48099557376000
9 -19670079356928000
10 7390762646372352000
11 -4427057815048028160000
12 2474680614543006105600000
13 -2020995311309719496294400000