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%I #11 Jun 30 2021 03:57:29
%S 27,72,127,172,207,217,237,247,257,267,270,271,273,274,275,276,278,
%T 279,287,297,327,372,427,472,527,572,627,672,702,712,720,721,723,724,
%U 725,726,728,729,732,742,752,762,782,792,827,872,927,972,1027,1072
%N Numbers whose base-10 representation has the same nonzero number of 2's and 7's.
%K nonn,base,easy
%O 1,1
%A _Olivier Gérard_
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