521829domain: 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, 0), (-1, 0, 1), (1, -1, 0), (1, 0, 1), (1, 1, -1)}.at n=11A148994a(n) = Sum_{k=1..n} (-1)^(k+1) * floor(n/k)^5.at n=13A344723