Lattice Path 4 2 [0,0,1,0,-1,0] [1,0,0,1,2,1] [0,1,-1,2,1,2] [0,2,-1,3,0,3] [1,2,2,2,0,2] [0,3,1,3,0,4] [1,3,2,3,0,4]