164407domain: NAppears in sequencesa(n)=a(n-1)+2*a(n-2)-[a(n-1)/2]-[a(n-4)/2]-[a(n-5)/2].at n=26A173534Expansion 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=10A224514Number of paths of length n starting at initial node of the path graph P_10.at n=20A336675