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A189509 as a simple table

n a(n)
2 1
3 6
4 65
5 701
6 9324
7 138016
8 2325740
9 43448940
10 897020784
11 20241273264 

[1,6,65,701,9324,138016,2325740,43448940,
 897020784,20241273264]

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Last modified May 6 08:50 EDT 2024. Contains 372292 sequences. (Running on oeis4.)