A039030 - OEIS

%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 Gérard_