%I #11 Apr 25 2021 12:14:20
%S 3006865,3006866,3006867,3006868,3006869,3006870,3006871,3006872,
%T 3006873,3006874,3006875,3006888,3006889,3006891,3006892,3006893,
%U 3006894,3006895,3006896,3006897,3006898,3006899,3006900,3006901
%N Numbers whose base-12 representation has exactly 7 runs.
%t Select[Range[300600,3007000],Length[Split[IntegerDigits[#,12]]]==7&] (* _Harvey P. Dale_, Feb 28 2021 *)
%K nonn,base
%O 1,1
%A _Clark Kimberling_