2279866324domain: NAppears in sequencesG.f.: A(x) = 1 + x*A_1(x)^2; A_1(x) = (1+x) + x*A_2(x)^2; A_2(x) = (1+x)^2 + x*A_3(x)^2; ...; A_{n}(x) = (1+x)^n + x*A_{n+1}(x)^2 for n>=0 with A(x) = A_0(x).at n=13A138294