[1,1,2,2,2,2,3,3,4,4,4,4,5,5,5,5,6,6,6,6,7,7,7,7, 7,7,8,8,8,8,9,9,10,10,10,10,11,11,11,11,11,11,12, 12,12,12,12,12,13,13,14,14,14,14,14,14,15,15,15, 15,16,16,16,16,16,16,17,17,17,17,18,18,18,18,18, 18,19,19,19,19,20,20]