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A039622 as a simple table

n a(n)
0 1
1 1
2 2
3 42
4 24024
5 701149020
6 1671643033734960
7 475073684264389879228560
8 22081374992701950398847674830857600
9 220381378415074546123953914908618547085974856000
10 599868742615440724911356453304513631101279740967209774643120000 

[1,1,2,42,24024,701149020,1671643033734960,
 475073684264389879228560,
 22081374992701950398847674830857600,
 220381378415074546123953914908618547085974856000,
 59986874261544072491135645330451363110127974096720\
 9774643120000]

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Last modified April 24 13:49 EDT 2024. Contains 371958 sequences. (Running on oeis4.)