# A052625 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 6
4 48
5 360
6 3600
7 45360
8 645120
9 10160640
10 177811200
11 3432844800
12 72329241600
13 1650160512000
14 40537905408000
15 1067062284288000
16 29961435119616000
17 893842506805248000
18 28234468042260480000