a(n) = (n-1)^n - 1.A085606a(n) = (n-1)^n - 1.Terms a(0) =0a(1) =-1a(2) =0a(3) =7a(4) =80a(5) =1023a(6) =15624a(7) =279935a(8) =5764800a(9) =134217727a(10) =3486784400a(11) =99999999999External referencesoeis: A085606