A043693 Numbers n such that number of runs in the base 4 representation of n is even.

4, 6, 7, 8, 9, 11, 12, 13, 14, 16, 20, 22, 23, 26, 31, 32, 37, 40, 41, 43, 47, 48, 53, 58, 60, 61, 62, 64, 68, 70, 71, 72, 73, 75, 76, 77, 78, 80, 84, 86, 87, 90, 95, 97, 98, 99, 100, 102, 103, 106, 108, 109, 110, 113, 114, 115, 116, 118