285605domain: 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, 1), (-1, 0, 1), (0, 1, 1), (1, 0, -1), (1, 1, 1)}.at n=9A150847Number of idempotent 5 X 5 0..n matrices of rank 4.at n=11A224336