The OEIS is supported by the many generous donors to the OEIS Foundation.
%I #11 Apr 24 2021 21:00:55
%S 5740,12301,18862,25423,31984,38545,45106,46564,47293,48022,48751,
%T 49480,50209,50938,51100,51181,51262,51343,51424,51505,51586,51604,
%U 51613,51622,51631,51640,51649,51658,51660,51661,51662
%N Numbers having four 7's in base 9.
%t Select[Range[52000],DigitCount[#,9,7]==4&] (* _Harvey P. Dale_, Nov 05 2011 *)
%Y Cf. A007095.
%K nonn,base
%O 1,1
%A _Clark Kimberling_