-32040domain: ZAppears in sequencesExpansion of (1-x)*(2*x^2+2*x+1) / ((x^2-x-1)*(x^2+x+1)).at n=22A111734G.f.: (1+x^2)^2*(x^4-6*x^3+1)/(x^2-1)^4.at n=41A115046G.f. satisfies: A(x) = G(x/A(x))^2 and G(x)^2 = A(x*G(x)^2) where G(x) = Sum_{n>=0} C(2*n,n)^2*x^n.at n=8A172390