a(n) = Product_{k=1..n} lcm(n,k).A071248a(n) = Product_{k=1..n} lcm(n,k).Terms a(0) =1a(1) =4a(2) =54a(3) =768a(4) =75000a(5) =466560a(6) =592950960a(7) =5284823040External referencesoeis: A071248