[1,3,1,4,3,1,6,4,3,1,7,6,4,3,1,9,7,6,4,3,1,10,9,7, 6,4,3,1,12,10,9,7,6,4,3,1,13,12,10,9,7,6,4,3,1,15, 13,12,10,9,7,6,4,3,1,16,15,13,12,10,9,7,6,4,3,1, 18,16,15,13,12,10,9,7,6,4,3,1,19,18,16,15,13,12, 10,9,7,6,4,3,1]