a(n) = 2*(n^2)!*Product_{k=0..n-1} k!/(n+k)!.
A067700
a(n) = 2*(n^2)!*Product_{k=0..n-1} k!/(n+k)!.
Terms
- a(0) =2a(1) =2a(2) =4a(3) =84a(4) =48048a(5) =1402298040
External references
- oeis: A067700
A067700
a(n) = 2*(n^2)!*Product_{k=0..n-1} k!/(n+k)!.