[1,2,1,4,3,5,2,4,1,4,3,5,8,2,4,7,1,4,8,10,3,5,8, 11,2,4,7,11,1,4,8,10,13,3,5,8,11,13,2,4,7,11,13,1, 4,8,10,13,16,3,5,8,11,13,16,2,4,7,11,13,16,18,1,4, 8,10,13,16,18,3,5,8,11,13,16,20]