746678311domain: NPropertiesPrimalityPrimeyesAppears in sequencesE.g.f.: A(x) = exp(x*A(x)^4*exp(x^2*A(x)^8*exp(x^3*A(x)^12*exp(x^4*A(x)^16*exp(...))))), an infinite power tower.at n=7A141359Prime numbersat n=38540796