2, 2, 4, 4, 4, 5, 5, 7, 7, 7, 9, 9, 9, 10, 10, 12, 12, 12, 13, 13, 15, 15, 15, 17, 17, 17, 18, 18, 20, 20, 20, 22, 22, 22, 23, 23, 25, 25, 25, 26, 26, 28, 28, 28, 30, 30, 30, 31, 31, 33, 33, 33, 34, 34, 36, 36, 36, 38, 38, 38, 39, 39, 41, 41, 41, 43, 43, 43, 44, 44, 46, 46, 46, 47, 47, 49, 49, 49, 51, 51, 51, 52, 52, 54, 54, 54, 56