%I #15 Jun 29 2021 02:20:09
%S 27,45,76,94,125,143,153,160,167,181,188,189,190,191,193,194,223,241,
%T 272,290,297,304,311,315,316,317,319,320,325,332,370,388,419,437,468,
%U 486,496,503,510,524,531,532,533,534,536,537,566,584,615,633,640,647
%N Numbers whose base-7 representation has the same nonzero number of 3's and 6's.
%t Select[Range[700],DigitCount[#,7,3]==DigitCount[#,7,6]>0&] (* _Harvey P. Dale_, May 19 2011 *)
%Y Cf. A007093.
%K nonn,base,easy
%O 1,1
%A _Olivier Gérard_