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A191094 as a simple table

n a(n)
1 1
2 4
3 28
4 228
5 2018
6 18892
7 184400
8 1857856
9 19189675
10 202214452

[1,4,28,228,2018,18892,184400,1857856,19189675,
 202214452]

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Last modified May 18 17:28 EDT 2021. Contains 343996 sequences. (Running on oeis4.)