419025809664domain: NAppears in sequencesG.f.: A(x) = cm4(x)^2 + sm4(x)^2 where cm4(x) and sm4(x) are the g.f.s of A153300 and A153301, respectively, that satisfy cm4(x)^4 - sm4(x)^4 = 1.at n=8A153302