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A198087 as a simple table

n a(n)
1 1
2 1
3 7
4 51
5 580
6 14960
7 692710
8 57268094
9 9248071023
10 2766940534117
11 1541427833628443

[1,1,7,51,580,14960,692710,57268094,9248071023,
 2766940534117,1541427833628443]

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Last modified February 28 08:52 EST 2021. Contains 341695 sequences. (Running on oeis4.)