a(1)=1; a(n+1) = Reverse((1 + a(n))^2).A193914a(1)=1; a(n+1) = Reverse((1 + a(n))^2).Terms a(0) =1a(1) =4a(2) =52a(3) =9082a(4) =98800528External referencesoeis: A193914