[1,1,2,2,3,4,3,4,5,6,5,6,7,8,9,8,9,10,11,12,13,13, 14,15,16,17,18,19,21,22,23,24,25,26,27,28,34,35, 36,37,38,39,40,41,42,55,56,57,58,59,60,61,62,63, 64]