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%I #9 Aug 22 2021 00:13:32
%S 10,20,30,40,50,60,70,80,81,90,92,93,94,95,96,97,98,101,111,121,131,
%T 141,151,161,162,172,180,181,183,184,185,186,187,188,192,202,212,222,
%U 232,242,243,253,263,270,271,272,274,275,276,277
%N Numbers whose maximal base-9 run length is 2.
%t Select[Range[300],Max[Length/@Split[IntegerDigits[#,9]]]==2&] (* _Harvey P. Dale_, Sep 01 2014 *)
%K nonn,base
%O 1,1
%A _Clark Kimberling_