244664domain: NAppears in sequencesa(n) = 4 * floor(28*2^n/15).at n=15A102650Number 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, 1, 0), (0, 1, -1), (1, 0, 0)}.at n=14A148016