# A191461 (b-file synthesized from sequence entry)
0 1
1 1
2 1
3 2
4 18
5 24
6 480
7 720
8 23520
9 100800
10 1874880
11 3628800
12 341953920
13 479001600
14 36739422720
15 468583315200
16 8960682931200
17 20922789888000
18 4289844445286400
19 6402373705728000
20 1012647189038284800
21 18895538930171904000
22 350378437544239104000