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