a(n) = a(n-1)^2 + 4 * a(n-1), with a(0) = 2.A382437a(n) = a(n-1)^2 + 4 * a(n-1), with a(0) = 2.Terms a(0) =2a(1) =12a(2) =192a(3) =37632a(4) =1416317952External referencesoeis: A382437