-10216206000domain: ZAppears in sequencesExpand sin x / exp x = x-x^2+x^3/3-x^5/30+... and invert nonzero coefficients.at n=15A007415Expand cos x / exp x and invert nonzero coefficients.at n=15A007452Expansion of E.g.f.: (1 + x)/(1 + x + x^2/2).at n=15A009014