77875414462domain: NAppears in sequencesG.f.: A(x) = INV(x-x^2 - x^2*INV(x-2*x^2 - x^2*INV(x-4*x^2 - x^2*INV(x-8*x^2 - x^2*INV(x-16*x^2 - ...))))), where INV(F(x)) = series reversion of F(x).at n=13A196711