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A333522
as a simple table
n
a(n)
1
1
2
8
3
48
4
68
5
1158
6
4752
7
81926
8
1059600
9
713949458
10
299601649920
[1,8,48,68,1158,4752,81926,1059600,713949458, 299601649920]