857088domain: NAppears in sequencesG.f. satisfies: x = A(x - A(x^2 - A(x^3 - A(x^4 - A(x^5 -...))))).at n=17A2288626*s*t*(4*s^4 + 3*t^4), where s > 0, t = 1..s.at n=18A241923