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A241842 as a simple table

n a(n)
1 0
2 0
3 1
4 4
5 18
6 106
7 846
8 11095
9 261056
10 11716488
11 1006700452

[0,0,1,4,18,106,846,11095,261056,11716488,
 1006700452]

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Last modified August 8 14:04 EDT 2020. Contains 336298 sequences. (Running on oeis4.)