# A013371 (b-file synthesized from sequence entry)
0 0
1 2
2 0
3 2
4 4480
5 2
6 274560
7 717516802
8 20650240
9 397299302402
10 1260764869707520
11 211694311628802
12 3189730834295158400
13 12098583209553471488002
14 6723227372694939050880