[1,2,2,3,4,3,4,5,5,4,5,6,6,7,5,6,7,7,8,8,6,7,8,8, 9,9,9,7,8,9,9,10,10,10,11,8,9,10,10,11,11,11,12, 12,9,10,11,11,12,12,12,13,13,14,10,11,12,12,13,13, 13,14,14,15,14,11,12,13,13,14,14,14,15,15,16,15, 16,12,13,14,14,15,15,15,16,16,17,16,17,17]