a(n) = Product_{j=1..n} j^(ceiling(sqrt(j))).

A372241

a(n) = Product_{j=1..n} j^(ceiling(sqrt(j))).

Terms

    a(0) =1a(1) =1a(2) =4a(3) =36a(4) =576a(5) =72000a(6) =15552000a(7) =5334336000

External references