a(n) = 8*(6*n^2-37*n+60)*n^(n-7)*(2*n-7)!/(n-4)!.
A134164
a(n) = 8*(6*n^2-37*n+60)*n^(n-7)*(2*n-7)!/(n-4)!.
Terms
- a(0) =1a(1) =48a(2) =4320a(3) =638400a(4) =143216640a(5) =45912303360
External references
- oeis: A134164
A134164
a(n) = 8*(6*n^2-37*n+60)*n^(n-7)*(2*n-7)!/(n-4)!.