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A261886 as a simple table

n a(n)
0 0
1 1
2 -2
3 11
4 -96
5 1080
6 -13776
7 179592
8 -2257536
9 36167616
10 -1328400000
11 53474351040
12 -364978483200
13 -111366266618880
14 2057176091013120
15 861071536310630400
16 -50092279632602726400
17 -9303569614922165452800
18 1142810852264472571084800
19 154051064897857365779251200
20 -35956459453770594679062528000

[0,1,-2,11,-96,1080,-13776,179592,-2257536,
 36167616,-1328400000,53474351040,-364978483200,
 -111366266618880,2057176091013120,
 861071536310630400,-50092279632602726400,
 -9303569614922165452800,1142810852264472571084800,
 154051064897857365779251200,
 -35956459453770594679062528000]

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Last modified September 21 23:55 EDT 2019. Contains 327286 sequences. (Running on oeis4.)