# A354278 (b-file synthesized from sequence entry)
1 0
2 1
3 2
4 3
5 24
6 50
7 720
8 4095
9 35840
10 267624
11 3628800
12 35724150
13 479001600
14 5240149200
15 82614884352
16 1188272460375
17 20922789888000
18 320893244672000
19 6402373705728000
20 113803149223980216
21 2379913632645120000
22 46396417566975840000
23 1124000727777607680000