49092domain: NAppears in sequencesCoefficient of q^2 in nu(n), where nu(0)=1, nu(1)=b and, for n>=2, nu(n)=b*nu(n-1)+lambda*(1+q+q^2+...+q^(n-2))*nu(n-2) with (b,lambda)=(1,2).at n=13A074353Expansion of Product_{k>=1} (1 + x^(k^2))^2/(1 - x^(k^2))^2.at n=37A279227