52495domain: NAppears in sequencesReduced interval graphs with n nodes.at n=11A005977Number 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, 1, -1), (1, -1, -1), (1, 0, 1)}.at n=10A148781