# A375833 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 6
4 0
5 60
6 1440
7 840
8 100800
9 1829520
10 6350400
11 419459040
12 7125148800
13 72657224640
14 3691516308480
15 66691652227200
16 1362335156582400
17 60600254383468800
18 1285478183493504000
19 40463468995171622400
20 1701073478756171520000