122436domain: NAppears in sequencesG.f. satisfies: A(x) = 1 + x/A(-x)^2.at n=13A213252G.f. satisfies: A(x) = 1/(1 - x*A(-x)^2).at n=12A243863G.f.: x / (Sum_{k>=1} x^k / (1 + x^k)^2).at n=19A335228Expansion of (1/x) * Series_Reversion( x / ( (1+x)^3 * (1+2*x)^2 ) ).at n=5A379521