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A189347
as a simple table
n
a(n)
1
0
2
4
3
48
4
12592
5
10252800
6
64731638400
7
2239546267804672
8
494966160398383884544
[0,4,48,12592,10252800,64731638400, 2239546267804672,494966160398383884544]
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Last modified September 30 05:35 EDT 2023. Contains 365781 sequences. (Running on oeis4.)
