636105618633domain: NAppears in sequencesG.f. A(x) satisfies: 1 = A(x) - x/(A(x) - x*A(x)/(A(x) - x*A(x)^2/(A(x) - x*A(x)^3/(A(x) - x*A(x)^4/(A(x) ...))))), a continued fraction relation.at n=20A338747