The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #14 Apr 23 2023 21:57:27
%S 285,628,971,1314,1657,1755,1804,1853,1902,1951,1965,1972,1979,1986,
%T 1993,1995,1996,1997,1998,1999,2001,2007,2049,2343,2686,3029,3372,
%U 3715,4058,4156,4205,4254,4303,4352,4366,4373,4380
%N Numbers whose base-7 representation contains exactly three 5's.
%t Select[Range[5000],DigitCount[#,7,5]==3&] (* _Harvey P. Dale_, Apr 06 2015 *)
%Y Cf. A007093.
%K nonn,base
%O 1,1
%A _Clark Kimberling_