%I #12 Jun 20 2021 15:02:33
%S 2,3,4,5,6,7,16,17,18,19,20,23,24,25,26,27,30,31,32,33,34,37,38,39,40,
%T 41,44,45,46,47,48,51,52,53,54,55,63,70,77,84,91,99,105,114,115,116,
%U 117,118,121,122,123,124,125,128,129,130,131,132,135,136,137,138,139
%N Numbers whose base-7 representation has the same number of 0's and 1's.
%H Daniel Starodubtsev, <a href="/A039030/b039030.txt">Table of n, a(n) for n = 1..10000</a>
%Y Cf. A007093.
%K nonn,base,easy
%O 1,1
%A _Olivier GĂ©rard_
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