[0,0,1,2,2,3,3,5,4,6,5,7,6,7,7,10,8,9,9,12,10,11, 11,14,12,14,13,15,14,17,15,19,16,20,17,19,18,19, 19,26,20,22,21,23,22,23,23,30,24,26,25,28,26,27, 27,30,28,30,29,33,30,31,31,35,32,34,33,38,34,37, 35,38,36,38,37,39]