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A090931
as a simple table
n
a(n)
1
0
2
0
3
0
4
8
5
140
6
5940
7
316708
8
21536080
[0,0,0,8,140,5940,316708,21536080]
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Last modified September 16 20:35 EDT 2024. Contains 375977 sequences. (Running on oeis4.)