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A278790
as a simple table
n
a(n)
1
0
2
2
3
27
4
382
5
4804
6
54600
7
592922
8
6248290
9
64659361
10
661448081
11
6715824025
[0,2,27,382,4804,54600,592922,6248290,64659361, 661448081,6715824025]