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A268572 as a simple table

n a(n)
1 0
2 0
3 2
4 1
5 4
6 9
7 38
8 133
9 640
10 2864

[0,0,2,1,4,9,38,133,640,2864]

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Last modified April 25 08:20 EDT 2024. Contains 371964 sequences. (Running on oeis4.)