2223504domain: NAppears in sequencesExpansion of (1-x)*(1-3*x)*(1-3*x+x^2)/(1-9*x+28*x^2-35*x^3+15*x^4-x^5).at n=12A224514Number of paths of length n starting at initial node of the path graph P_10.at n=24A336675