240955domain: NAppears in sequencesG.f.: 1/((1-x)*(1-x^2))^5.at n=17A038165Expansion of (5+10*x+x^2)/(1-x)^10.at n=8A059602G.f.: 1 + Sum_{n>=1} a(n)*x^n/(1 - x^n) = Product_{n>=1} (1 + x^n)^n.at n=25A300276