# A134367 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 6
4 576
5 1728000
6 268738560000
7 3252016064102400000
8 4296582355504620109824000000
9 828592942960967278432052230225920000000
10 30067980714167580599742311330438184960000000000000000