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%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_
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