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