-1468domain: ZAppears in sequencesExpansion of Product_{k>=1} (1 - x^(2*k))^(2*k)/(1 - x^(2*k-1))^(2*k-1).at n=41A281781Expansion of Product_{k>=1} (1 - x^k)^(sigma_2(k)).at n=12A288389Expansion of e.g.f. exp(1 - (1 + x) * exp(x)).at n=9A352376