A043727 Numbers whose number of runs in the base-2 representation is congruent to 3 mod 4.

5, 9, 11, 13, 17, 19, 23, 25, 27, 29, 33, 35, 39, 47, 49, 51, 55, 57, 59, 61, 65, 67, 71, 79, 85, 95, 97, 99, 103, 111, 113, 115, 119, 121, 123, 125, 129, 131, 135, 143, 149, 159, 165, 169, 171, 173, 181, 191, 193, 195, 199, 207, 213

Offset: 1

Author

Clark Kimberling

Keywords

• nonn
• base

Programs

Mathematica

Select[Range[300],Mod[Length[Split[IntegerDigits[#,2]]],4]==3&] (* Harvey P. Dale, Dec 31 2017 *)