# A134087 (b-file synthesized from sequence entry)
0 1
1 4
2 32
3 672
4 42816
5 8822400
6 6065609984
7 14256471226880
8 117000916309144576
9 3410202131850138806272
10 357670541003601468527333376
11 136391046228660672398602237353984