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A007577
as a simple table
n
a(n)
0
1
1
20
2
400
3
8902
4
197281
5
4865577
6
119057155
7
3194833218
[1,20,400,8902,197281,4865577,119057155, 3194833218]
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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)
