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%I #7 Oct 01 2018 20:16:30
%S 69905,69906,69907,69912,69913,69915,69916,69917,69918,69921,69922,
%T 69923,69924,69926,69927,69932,69933,69934,69937,69938,69939,69940,
%U 69942,69943,69944,69945,69947,70020,70022,70023
%N Numbers n such that number of runs in the base 4 representation of n is congruent to 0 mod 9.
%t Select[Range[80000],Mod[Length[Split[IntegerDigits[#,4]]],9]==0&] (* _Harvey P. Dale_, Oct 01 2018 *)
%K nonn,base
%O 1,1
%A _Clark Kimberling_
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