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