[1,1,1,2,2,3,2,4,3,5,3,6,4,7,4,8,5,9,5,10,6,11,6, 12,7,13,7,14,8,15,8,16,9,17,9,18,10,19,10,20,11, 21,11,22,12,23,12,24,13,25,13,26,14,27,14,28,15, 29,15,30,16,31,16,32,17,33,17,34,18,35,18,36,19, 37,19,38,20,39,20]