195291domain: 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, 1, 0), (0, 1, -1), (0, 1, 0), (1, -1, 1)}.at n=11A148430Euler transform of 2^floor(n/2), (A016116).at n=21A358369