266668876540domain: NAppears in sequencesNumber of walks of length 2n+8 in the path graph P_9 from one end to the other.at n=18A005024Degree of variety K_{2,n}^3.at n=7A013700Expansion of x^3/((1-3*x+x^2)*(1-5*x+5*x^2)).at n=22A094865