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A171111
as a simple table
n
a(n)
1
0
2
0
3
0
4
1
5
7915
6
34435125
7
153796445095
[0,0,0,1,7915,34435125,153796445095]
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Last modified July 16 16:26 EDT 2024. Contains 374358 sequences. (Running on oeis4.)