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