# A020547 (b-file synthesized from sequence entry)
0 0
1 0
2 2
3 30
4 552
5 14280
6 517680
7 25396560
8 1625662080
9 131681531520
10 13168185811200
11 1593350882323200
12 229442532323558400
13 38775788037405619200
14 7600054456464819148800
15 1710012252722891749632000
16 437763136697374129754112000