4721185domain: NAppears in sequences[ exp(5/19)*n! ].at n=9A030873Number 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), (-1, 1, -1), (1, 0, -1), (1, 0, 1)}.at n=13A149126