55132domain: 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, 0, 1), (0, 0, -1), (1, 0, 0), (1, 1, 1)}.at n=8A150808a(n) = n*(n+1)*(3*n^2+5*n+4)/12.at n=21A176060