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