-3230domain: ZAppears in sequencesExpansion of q * f(-q^20) / (f(q) * chi(-q^5)) in powers of q where f(), chi() are Ramanujan theta functions.at n=29A145724a(n) = Sum_{d|n} (-1)^(d-1)*d^2.at n=51A321543a(n) = -4*a(n-1) - 3*a(n-2) + a(n-3), a(0) = 1, a(1) = -2, a(2) = 4.at n=9A322504