443934domain: 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, -1, 0), (-1, 1, -1), (0, 1, 0), (1, -1, 1)}.at n=13A148260a(n) = 972*n^2 - 1224*n + 414 with n > 0.at n=21A304166