22716418domain: NAppears in sequencesG.f. A(x) satisfies the condition that both A(x) and F(x) = A(x/F(x)^2) have zeros for every other coefficient after initial terms; g.f. of dual sequence A157307 satisfies the same condition.at n=10A157304Unsigned bisection of A157304 and A157305.at n=5A158120