82027domain: NAppears in sequencesa(n) = (n-3)*2^n + n*(n+3)/2 + 3.at n=12A104747Number 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), (1, -1, -1), (1, 0, -1), (1, 1, 1)}.at n=9A149620