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A123190 as a simple table

n a(n)
0 1
1 0
2 6
3 -6
4 120
5 -504
6 5268
7 -33960
8 286872
9 -2089656
10 16524528
11 -124872576
12 967652400
13 -7394858496
14 56948789280
15 -436704535776
16 3356724764544
17 -25767744878592
18 197948016193344
19 -1520029557845376
20 11674792161026688
21 -89658816678161280
22 688598927703310080

[1,0,6,-6,120,-504,5268,-33960,286872,-2089656,
 16524528,-124872576,967652400,-7394858496,
 56948789280,-436704535776,3356724764544,
 -25767744878592,197948016193344,-1520029557845376,
 11674792161026688,-89658816678161280,
 688598927703310080]

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Last modified August 2 14:13 EDT 2021. Contains 346424 sequences. (Running on oeis4.)