Squarefree part of A078522(n+1).A327248Squarefree part of A078522(n+1).Terms a(0) =6a(1) =210a(2) =1785a(3) =60639a(4) =915530a(5) =184030a(6) =14066106a(7) =80753867670External referencesoeis: A327248