-4808643120domain: ZAppears in sequencesG.f. C(x) satisfies C(x)^(1/2) - S(x)^(1/2) = 1 such that C'(x)*S(x)^(1/2) = S'(x)*C(x)^(1/2) = 72*x.at n=13A299853Expansion of (1 + 2*x)/(1 + 4*x^2)^(3/2).at n=30A331552