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A045904 as a simple table

n a(n)
0 0
1 0
2 0
3 1
4 5
5 31
6 160
7 825
8 4074
9 19902
10 95920

[0,0,0,1,5,31,160,825,4074,19902,95920]

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Last modified October 17 02:45 EDT 2021. Contains 348048 sequences. (Running on oeis4.)