2684879domain: 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, 0), (0, 0, 1), (1, 1, -1), (1, 1, 0)}.at n=11A150461Numbers n such that phi(n) = 4*phi(n+1).at n=16A256937