203664domain: NAppears in sequencesNumber of partitions of 2n in which no parts are multiples of 4.at n=30A081055Expansion of phi(-x^6)^2 / (chi(x) * phi(-x)^2) in powers of x where phi(), chi() are Ramanujan theta functions.at n=20A260545G.f.: A(x) = Sum_{n>=0} x^n * (1+x)^(2*n^2) / A(x)^n.at n=9A321608