51321600domain: NAppears in sequencesE.g.f. A(x) satisfies 1 - A'(x)^2 + 4*A(x)^3 = 0.at n=4A381359E.g.f. satisfies A(x) = exp( Integral abs(1/A(x)) dx ), where abs(F(x)) equals the series expansion formed by the unsigned coefficients in F(x).at n=13A381360