164108domain: NAppears in sequencesImpedances of an n-terminal network.at n=5A003130Number 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), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.at n=9A150294