-2440domain: ZAppears in sequencesExpansion of (1-q)^k/Product_{j=1..k} (1-q^j) for k=12.at n=17A275643G.f.: Sum_{n>=0} (n+1) * x^n * (1 + x^n)^n / (1 + x^(n+1))^(n+2).at n=23A326285