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A225796
as a simple table
n
a(n)
1
1
2
12
3
456
4
415416
5
194191194192
6
3816727961538167279616
7
35270249819024056401913527024981902405640192
[1,12,456,415416,194191194192, 3816727961538167279616, 35270249819024056401913527024981902405640192]