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A002917
as a simple table
n
a(n)
0
4
1
140
2
4056
3
129360
4
4381848
5
153700408
6
5519859080
7
201714989064
[4,140,4056,129360,4381848,153700408,5519859080, 201714989064]
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Last modified April 23 09:48 EDT 2024. Contains 371905 sequences. (Running on oeis4.)