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A188453
as a simple table
n
a(n)
1
0
2
0
3
0
4
66
5
30090
6
18014566
7
15978843654
8
20633840650794
[0,0,0,66,30090,18014566,15978843654, 20633840650794]
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Last modified August 7 21:19 EDT 2024. Contains 375017 sequences. (Running on oeis4.)