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A126967 as a simple table

n a(n)
0 1
1 0
2 -4
3 48
4 -624
5 9600
6 -175680
7 3790080
8 -95235840
9 2752081920
10 -90328089600
11 3328103116800
12 -136191650918400
13 6131573025177600
14 -301213549769932800
15 16030999766605824000
16 -918678402394841088000
17 56387623092958789632000
18 -3690023220507773140992000

[1,0,-4,48,-624,9600,-175680,3790080,-95235840,
 2752081920,-90328089600,3328103116800,
 -136191650918400,6131573025177600,
 -301213549769932800,16030999766605824000,
 -918678402394841088000,56387623092958789632000,
 -3690023220507773140992000]

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Last modified June 18 01:16 EDT 2021. Contains 345098 sequences. (Running on oeis4.)