# A109589 (b-file synthesized from sequence entry)
0 0
1 1
2 -2
3 0
4 -8
5 40
6 -384
7 4144
8 -54144
9 815616
10 -13958400
11 267218688
12 -5657444352
13 131222866944
14 -3308765300736
15 90105807790080
16 -2635416865112064
17 82388152861360128
18 -2741414412289572864
19 96732603325960224768
20 -3607731031922910167040