941780domain: NAppears in sequencesCoefficient of q^1 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=18A074352Coefficient of x^n in (x^2 + 98*x + 1)^n.at n=3A181553