[1,2,2,3,3,3,4,4,5,5,5,6,6,7,7,7,8,8,8,9,9,10,10, 10,11,11,11,12,12,13,13,13,14,14,14,15,15,16,16, 16,17,17,17,18,18,18,19,19,20,20,20,21,21,21,22, 22,23,23,23,24,24,24,25,25,26,26]