a(n) = 2^(n(n-1)/2) * Product_{k=1..n} k!.

A098695

a(n) = 2^(n(n-1)/2) * Product_{k=1..n} k!.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =96a(4) =18432a(5) =35389440a(6) =815372697600

External references