# A052645 (b-file synthesized from sequence entry)
0 0
1 0
2 4
3 24
4 48
5 240
6 1440
7 10080
8 80640
9 725760
10 7257600
11 79833600
12 958003200
13 12454041600
14 174356582400
15 2615348736000
16 41845579776000
17 711374856192000
18 12804747411456000
19 243290200817664000