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