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A259880
as a simple table
n
a(n)
0
1
1
-1
2
2
3
-18
4
168
5
-1920
6
25920
7
-418320
[1,-1,2,-18,168,-1920,25920,-418320]
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Last modified May 2 07:06 EDT 2024. Contains 372178 sequences. (Running on oeis4.)