700396domain: NAppears in sequencesa(0)=0 and a(n+1) = 3*a(n) + 2^(n+2).at n=11A145563Number 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, 0), (-1, 1, -1), (0, 1, 1), (1, -1, 0)}.at n=13A148345