# A191460 (b-file synthesized from sequence entry)
0 1
1 1
2 -1
3 2
4 6
5 24
6 -480
7 720
8 13440
9 100800
10 -1874880
11 3628800
12 22619520
13 479001600
14 -36739422720
15 468583315200
16 6345334195200
17 20922789888000
18 -4289844445286400
19 6402373705728000
20 363873320191180800
21 18895538930171904000
22 -350378437544239104000