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A287892 as a simple table

n a(n)
0 0
1 1
2 1
3 3
4 7
5 25
6 88
7 366
8 1583
9 7336
10 34982
11 172384

[0,1,1,3,7,25,88,366,1583,7336,34982,172384]

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Last modified February 16 21:37 EST 2020. Contains 331975 sequences. (Running on oeis4.)