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A287511 as a simple table

n a(n)
1 0
2 0
3 1
4 3
5 15
6 88
7 680
8 7623
9 126047
10 3118189
11 112367111
12 5736020864 

[0,0,1,3,15,88,680,7623,126047,3118189,112367111,
 5736020864]

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Last modified April 25 10:22 EDT 2024. Contains 371967 sequences. (Running on oeis4.)