133304domain: NAppears in sequencesExpansion of (1-2x)^2/((1-x)^2(1-2x-x^2)^2).at n=13A108360Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 0, 1), (0, 1, 0), (0, 1, 1), (1, -1, -1)}.at n=10A149903