A043727 - OEIS

%I #10 Oct 04 2023 23:44:51

%S 5,9,11,13,17,19,23,25,27,29,33,35,39,47,49,51,55,57,59,61,65,67,71,

%T 79,85,95,97,99,103,111,113,115,119,121,123,125,129,131,135,143,149,

%U 159,165,169,171,173,181,191,193,195,199,207,213

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

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

%K nonn,base

%O 1,1

%A _Clark Kimberling_