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%I #11 Mar 22 2022 15:07:40
%S 111,222,333,444,555,666,777,888,999,1000,1110,1112,1113,1114,1115,
%T 1116,1117,1118,1119,1222,1333,1444,1555,1666,1777,1888,1999,2000,
%U 2111,2220,2221,2223,2224,2225,2226,2227,2228,2229
%N Numbers whose maximal base-10 run length is 3.
%H Harvey P. Dale, <a href="/A033284/b033284.txt">Table of n, a(n) for n = 1..1000</a>
%t Select[Range[3000],Max[Length/@Split[IntegerDigits[#]]]==3&] (* _Harvey P. Dale_, Mar 22 2022 *)
%K nonn,base
%O 1,1
%A _Clark Kimberling_