A043676 - OEIS

%I #12 Apr 25 2021 12:17:13

%S 257,258,259,260,261,262,263,264,265,266,267,268,269,270,271,288,289,

%T 291,292,293,294,295,296,297,298,299,300,301,302,303,304,305,306,308,

%U 309,310,311,312,313,314,315,316,317,318,319

%N Numbers whose base-16 representation has exactly 3 runs.

%t Select[Range[350],Length[Split[IntegerDigits[#,16]]]==3&] (* _Harvey P. Dale_, Oct 01 2011 *)

%K nonn,base

%O 1,1

%A _Clark Kimberling_