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A039414 Numbers whose base-10 representation has the same nonzero number of 2's and 7's. 0

%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 GĂ©rard_

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Last modified June 21 23:34 EDT 2024. Contains 373560 sequences. (Running on oeis4.)