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Numbers whose base-10 representation has the same number of 3's and 7's.
1

%I #10 Jun 26 2021 01:53:29

%S 0,1,2,4,5,6,8,9,10,11,12,14,15,16,18,19,20,21,22,24,25,26,28,29,37,

%T 40,41,42,44,45,46,48,49,50,51,52,54,55,56,58,59,60,61,62,64,65,66,68,

%U 69,73,80,81,82,84,85,86,88,89,90,91,92,94,95,96,98,99,100,101,102

%N Numbers whose base-10 representation has the same number of 3's and 7's.

%K nonn,base,easy

%O 1,3

%A _Olivier GĂ©rard_