# A187751 (b-file synthesized from sequence entry)
0 0
1 0
2 0
3 81
4 225280
5 7991790625
6 1078848154238976
7 65180706714634067542224001
8 1650157594512930366268925848349310976
9 66807065275536807794426016376688705273224158387201