A172755 - OEIS

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A172755 as a simple table

n	a(n)
1	0
2	1
3	28681
4	38578100932
5	552523141020099900
6	58256290618618126540488181
7	34391373190693800172956484206435649
8	92324899878614980043437168195067658467141080

[0,1,28681,38578100932,552523141020099900, 58256290618618126540488181, 34391373190693800172956484206435649, 92324899878614980043437168195067658467141080]