%I
%S 25,31,74,80,123,129,151,158,165,175,176,177,180,181,186,193,199,206,
%T 213,217,218,219,222,223,234,241,270,276,319,325,368,374,417,423,466,
%U 472,494,501,508,518,519,520,523,524,529,536,542,549,556,560,561,562
%N Numbers whose base7 representation has the same nonzero number of 3's and 4's.
%H Harvey P. Dale, <a href="/A039323/b039323.txt">Table of n, a(n) for n = 1..1000</a>
%t Select[Range[600],DigitCount[#,7,3]==DigitCount[#,7,4]>0&] (* _Harvey P. Dale_, May 14 2022 *)
%Y Cf. A007093.
%K nonn,base,easy
%O 1,1
%A _Olivier GĂ©rard_
