174262domain: NAppears in sequencesG.f.: 1 + Sum_{n>=1} a(n)*x^n/(1 - x^n) = 1/(1 - x/(1 - x^2/(1 - x^3/(1 - x^4/(1 - ...))))).at n=23A285903Expansion of Product_{k>=2} (1 + x^k)/(1 - x^k).at n=41A300415