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%I #10 Jul 01 2021 00:00:05
%S 43,87,187,231,331,375,439,451,463,487,499,511,516,517,518,520,521,
%T 522,524,525,526,527,535,547,559,571,619,663,763,807,907,951,1011,
%U 1023,1035,1044,1045,1046,1048,1049,1050,1052,1053,1054,1055,1059
%N Numbers whose base-12 representation has the same nonzero number of 3's and 7's.
%K nonn,base,easy
%O 1,1
%A _Olivier Gérard_
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