a(n) = A203309(n)/A000178(n) where A000178 are superfactorials.

A203467

a(n) = A203309(n)/A000178(n) where A000178 are superfactorials.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =15a(4) =630a(5) =198450a(6) =589396500

External references