254868domain: NAppears in sequencesT(2n,n+2), T given by A026769.at n=8A026884Number 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, 0), (0, 0, -1), (0, 1, 0), (1, -1, 0)}.at n=13A148132