-3572domain: ZAppears in sequencesG.f. satisfies A(x) = A(A(x)) - x^2 with A(0)=0.at n=6A138740Triangle formed by coefficients of the expansion of p(x, n), where p(x,n) = (1+x-x^3)^(n+1)*Sum_{j >= 0} (j+1)^n*(-x + x^3)^j.at n=58A156896a(n) = (-1)^n * A000032(n) - 1.at n=17A355021