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A197970 as a simple table

n a(n)
1 1
2 4
3 9
4 44
5 396
6 6005
7 151055
8 6363817
9 495956557
10 63984803623

[1,4,9,44,396,6005,151055,6363817,495956557,
 63984803623]

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Last modified May 18 12:03 EDT 2022. Contains 353807 sequences. (Running on oeis4.)