# A109582 (b-file synthesized from sequence entry)
0 -1
1 1
2 -2
3 0
4 24
5 -240
6 1440
7 -5040
8 -40320
9 1088640
10 -14515200
11 119750400
12 0
13 -24908083200
14 610248038400
15 -9153720576000
16 62768369664000
17 1422749712384000
18 -70426110763008000
19 1703031405723648000
20 -24329020081766400000
21 -51090942171709440000