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A221435
as a simple table
n
a(n)
1
120
2
5280
3
66240
4
161280
5
161280
6
812851200
7
20449013760000
8
921456860096102400
9
68695056598964266598400
[120,5280,66240,161280,161280,812851200, 20449013760000,921456860096102400, 68695056598964266598400]