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A180609 as a simple table

n a(n)
1 1
2 -1
3 3
4 -16
5 110
6 -540
7 -9240
8 292320
9 14908320
10 -1639612800
11 -33013854720
12 21046667685120
13 -549927873855360
14 -637881314775344640
15 76198391578224115200
16 41404329870413936025600
17 -12499862617277304901632000
18 -5212560012919105291193548800
19 3436632117109253032257698611200
20 1146156616720354265092896141312000
21 -1615552168543480516126725021634560000
22 -379914190499326491647463301427478528000
23 1268235921756889621556352102589895172096000

[1,-1,3,-16,110,-540,-9240,292320,14908320,
 -1639612800,-33013854720,21046667685120,
 -549927873855360,-637881314775344640,
 76198391578224115200,41404329870413936025600,
 -12499862617277304901632000,
 -5212560012919105291193548800,
 3436632117109253032257698611200,
 1146156616720354265092896141312000,
 -1615552168543480516126725021634560000,
 -379914190499326491647463301427478528000,
 1268235921756889621556352102589895172096000]

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Last modified April 24 17:29 EDT 2024. Contains 371962 sequences. (Running on oeis4.)