595358domain: NAppears in sequencesa(n) = A047980(2n+1).at n=29A047982Number 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), (-1, 1, 0), (0, 1, 1), (1, -1, -1)}.at n=13A148312