1286953domain: NPropertiesPrimalityPrimeyesAppears in sequencesG.f.: A(x) = 1/(1 - x*(1+x)/(1 - x^2*(1+x)/(1 - x^3*(1+x)/(1 - x^4*(1+x)/(1 - ...))))), a continued fraction.at n=19A193021Prime numbersat n=99105