A043692 Numbers whose base-3 representation has an even number of runs.
3, 5, 6, 7, 9, 12, 14, 17, 18, 22, 24, 25, 27, 30, 32, 33, 34, 36, 39, 41, 44, 46, 47, 48, 50, 53, 54, 57, 59, 60, 61, 64, 65, 67, 69, 70, 72, 76, 78, 79, 81, 84, 86, 87, 88, 90, 93, 95, 98, 99, 103, 105, 106, 108, 111, 113, 114, 115, 117
Offset: 1