1, 1, 3, 3, 4, 4, 6, 6, 7, 7, 9, 9, 10, 10, 12, 11, 12, 12, 14, 14, 15, 15, 16, 17, 18, 18, 20, 20, 21, 21, 23, 22, 23, 23, 25, 25, 26, 26, 28, 28, 29, 29, 31, 31, 32, 32, 34, 33, 34, 34, 36, 36, 37, 37, 38, 38, 39, 39, 41, 41, 42, 42, 44, 43, 44, 44, 46, 46