[0,1,2,2,4,4,3,5,6,6,4,6,8,8,8,5,7,9,10,10,10,6,8, 10,12,12,12,12,7,9,11,13,14,14,14,14,8,10,12,14, 16,16,16,16,16,9,11,13,15,17,18,18,18,18,18,10,12, 14,16,18,20,20,20,20,20,20,11,13,15,17]