a(n) = Product_{k=1..n} ceiling(n/k)!.

A308820

a(n) = Product_{k=1..n} ceiling(n/k)!.

Terms

    a(0) =1a(1) =2a(2) =12a(3) =96a(4) =2880a(5) =34560a(6) =5806080a(7) =92897280a(8) =25082265600

External references