[1,1,2,2,2,3,3,4,3,4,4,4,5,4,6,5,6,6,7,6,7,6,7,7, 7,8,8,9,7,9,7,10,8,11,8,11,9,10,10,11,10,11,10,11, 11,11,12,11,13,12,13,13,14,12,14,11,15,13,16,12, 14,12,15,14,14,14,15,16,15,16,16,15,17,16,16,16, 16,17,17,18]