-436867144domain: ZAppears in sequencesG.f.: Product_{n>=1} (1 - A002203(n)*x^n + (-x^2)^n) / (1 + A002203(n)*x^n + (-x^2)^n) where A002203(n) is the companion Pell numbers.at n=29A204384Expansion of 1/Sum_{k>=0} (2*k+1)^2*x^k.at n=11A296817