[0,1,2,2,3,4,4,5,6,7,7,8,9,9,10,11,11,12,13,14,14, 15,16,16,17,18,19,19,20,21,21,22,23,23,24,25,26, 26,27,28,28,29,30,31,31,32,33,33,34,35,35,36,37, 38,38,39,40,40,41,42,43,43,44,45,45,46,47,47,48, 49,50,50,51,52]