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Numbers whose base-4 representation has the same number of 0's and 2's.
1

%I #17 Jun 26 2021 06:45:09

%S 1,3,5,7,8,13,15,18,21,23,24,29,31,33,35,36,44,50,53,55,56,61,63,70,

%T 73,75,78,82,85,87,88,93,95,97,99,100,108,114,117,119,120,125,127,130,

%U 133,135,136,141,143,145,147,148,156,160,177,179,180,188,198,201,203

%N Numbers whose base-4 representation has the same number of 0's and 2's.

%H Daniel Starodubtsev, <a href="/A039003/b039003.txt">Table of n, a(n) for n = 1..10000</a>

%Y Cf. A007090, A160380, A160382.

%K nonn,base,easy

%O 1,2

%A _Olivier GĂ©rard_