# A375682 (b-file synthesized from sequence entry)
0 1
1 0
2 0
3 9
4 0
5 45
6 1080
7 630
8 30240
9 470610
10 1247400
11 38170440
12 523908000
13 3454050600
14 87950182320
15 1245647403000
16 14580569203200
17 346019491818000
18 5524280291930400
19 92520760776444000
20 2188180621979352000
21 40781057935225608000
22 857154570994798876800