165876domain: NAppears in sequencesa(n) = n*(n^3 - 1)/2.at n=22A027482Number 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, -1, 1), (-1, 0, 0), (0, 0, -1), (1, 1, 0)}.at n=11A149091Last terms in the groups defined in A160275.at n=9A160277