# A247256 (b-file synthesized from sequence entry)
0 1
1 1
2 0
3 -6
4 -12
5 20
6 300
7 252
8 -3024
9 -36720
10 106560
11 110880
12 12212640
13 -125629920
14 1005286464
15 -16865735040
16 252900345600
17 -3575747185920
18 58447092395520
19 -1014901444454400
20 18218754479923200
21 -346655486035998720
22 6952232946445839360
23 -145913061049673702400
24 3205301440394904238080