103052domain: NAppears in sequencesNumber 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, 0), (0, -1, 0), (0, 0, 1), (1, 1, -1)}.at n=11A148451Expansion of (1 + x + x^2)/(1 - x^2 - 2*x^3).at n=28A159288