# A189394 (b-file synthesized from sequence entry)
1 1
2 2
3 6
4 12
5 60
6 360
7 1260
8 2520
9 5040
10 55440
11 277200
12 720720
13 3603600
14 61261200
15 2205403200
16 293318625600
17 6746328388800
18 195643523275200