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A146498
as a simple table
n
a(n)
2
0
3
60
4
8472
5
504864
6
105970762
7
3866050034
8
52280148964
9
409561925588
10
2277489900016
[0,60,8472,504864,105970762,3866050034, 52280148964,409561925588,2277489900016]