a(n+1) = 3*A136016*a(n).A202948a(n+1) = 3*A136016*a(n).Terms a(0) =-3a(1) =-72a(2) =-7560a(3) =-1814400a(4) =-778377600a(5) =-523069747200External referencesoeis: A202948