154572domain: NAppears in sequencesSum of digits of numbers between 0 and (8/9)*(10^n-1).at n=4A089909Number 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, -1), (0, 1, 1), (1, 0, 0)}.at n=11A149841The fourth row of the ED4 array A167584.at n=16A167586