a(n) = Product_{j=1..n} Product_{k=1..n} gcd(j,k).

A092287

a(n) = Product_{j=1..n} Product_{k=1..n} gcd(j,k).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =96a(5) =480a(6) =414720a(7) =2903040a(8) =5945425920

External references