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