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