[1,-1,0,1,2,0,1,2,0,1,2,3,1,2,3,1,2,3,4,2,3,4,2,3, 4,5,3,4,5,3,4,5,6,4,5,6,4,5,6,7,5,6,7,5,6,7,8,6,7, 8,6,7,8,9,7,8,9,7,8,9,10,8,9,10,8,9,10,11,9,10,11, 9,10,11,12,10,11,12,10,11,12,13,11,12,13,11,12,13, 14]