# A091788 (b-file synthesized from sequence entry)
1 1
2 2
3 2
4 4
5 16
6 96
7 5184
8 829440
9 1911029760
10 13002646487040
11 10065920762063093760
12 9319918463639717615448883200
13 137422208150223932126848386360776224407552000