19758435domain: NAppears in sequencesG.f. A(x) satisfies: Series_Reversion( A(x)/(1 - i*x + A(x)^2) ) = A(x)/(1 + i*x + A(x)^2), where odd function A(x) = Sum_{n>=1} a(n)*x^(2*n-1) and i^2 = -1.at n=9A277179