525336domain: NAppears in sequencesSum{T(i,n-i): i=0,1,...,n}, array T as in A047120.at n=20A047121Number 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), (0, 1, 0), (1, -1, 1), (1, 1, -1)}.at n=12A148402