63967345068domain: NAppears in sequencesT(2n,n), array T given by A047000.at n=16A047009G.f. satisfies: A(x) = x/series_reversion(x/G(x)) where A(x) + A(-x) = 2*G(x^2) and G(x) is the g.f. of A046646.at n=31A116637