123561

Appears in sequences

• Coefficient 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)=(1,3).at n=12A074356
• p-INVERT of (0,1,0,1,0,1,...), where p(S) = 1 - S - S^4.at n=19A291220