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Numbers whose base-11 representation has the same nonzero number of 1's and 4's.
0

%I #13 Jun 30 2021 04:31:02

%S 15,45,125,147,158,165,167,168,170,171,172,173,174,175,180,191,202,

%T 213,224,235,257,287,378,408,485,495,497,498,500,501,502,503,504,505,

%U 507,518,540,551,562,573,584,595,620,650,741,771,862,892,983,1013

%N Numbers whose base-11 representation has the same nonzero number of 1's and 4's.

%t Select[Range[1100],DigitCount[#,11,1]==DigitCount[#,11,4]>0&] (* _Harvey P. Dale_, Jan 15 2019 *)

%K nonn,base,easy

%O 1,1

%A _Olivier GĂ©rard_