-5976domain: ZAppears in sequencesExpansion of (psi(x^3) / psi(x))^2 in powers of x where psi() is a Ramanujan theta function.at n=27A217786G.f. A(x) satisfies Sum_{n=-oo..+oo} (x^n - A(x))^n = Sum_{n>=0} x^(n^2).at n=13A370031