-107138260758domain: ZAppears in sequencesExpansion of 1 - 2*x - 2*x^2/(1 - 3*x - 4*x^2/(1 - 4*x - 6*x^2/(1 - 5*x - 8*x^2/(1 - 6*x - 10*x^2/(...))))), a continued fraction.at n=15A292831