-12650domain: ZAppears in sequencesFirst differences of coefficients of g.f. (1-x)^24.at n=20A078488Expansion of the series reversion of Sum_{n>=1} x^(n^2).at n=21A259938Expansion of Sum_{k>0} x^(2*k)/(1+x^k)^5.at n=22A363613G.f. A(x) satisfies A(x) = 1 + x*A(x)^3 - x^2*A(x)^5.at n=9A367027