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A156501
as a simple table
n
a(n)
2
2
3
0
4
50
5
18
6
13276
7
76680
8
40760544
9
1759663680
10
1948154942040
[2,0,50,18,13276,76680,40760544,1759663680, 1948154942040]
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Last modified May 5 15:44 EDT 2024. Contains 372275 sequences. (Running on oeis4.)