# A143001 (b-file synthesized from sequence entry)
0 0
1 1
2 15
3 391
4 14900
5 770596
6 51695280
7 4358885616
8 451036788480
9 56192122503936
10 8297504007091200
11 1433159145783936000
12 286297057932974899200
13 65505120288597559296000