-11820domain: ZAppears in sequencesExpansion of theta_3(q) / theta_3(q^2) in powers of q.at n=38A080015Expansion of phi(-q) / phi(q^2) in powers of q where phi() is a Ramanujan theta function.at n=38A210030Expansion of phi(q^2) / phi(q) in powers of q where phi() is a Ramanujan theta function.at n=19A210065