188061domain: NAppears in sequencesNumber 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, 1), (1, 0, 1), (1, 1, -1)}.at n=11A148846Number of non-equivalent ways to choose three points in an equilateral triangle grid of side n.at n=18A230723