# A052614 (b-file synthesized from sequence entry)
0 1
1 1
2 2
3 6
4 48
5 240
6 1440
7 10080
8 120960
9 1088640
10 10886400
11 119750400
12 1916006400
13 24908083200
14 348713164800
15 5230697472000
16 104613949440000
17 1778437140480000
18 32011868528640000
19 608225502044160000