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Numbers whose base-11 representation has the same nonzero number of 2's and 10's.
1

%I #15 Jun 30 2021 04:32:24

%S 32,112,153,233,252,263,285,296,307,318,329,340,351,352,353,355,356,

%T 357,358,359,360,361,395,475,516,596,637,717,758,838,879,959,1000,

%U 1080,1121,1201,1212,1223,1232,1233,1235,1236,1237,1238,1239,1240

%N Numbers whose base-11 representation has the same nonzero number of 2's and 10's.

%H Vincenzo Librandi, <a href="/A039464/b039464.txt">Table of n, a(n) for n = 1..5000</a>

%t Select[Range[2000],DigitCount[#,11,2]==DigitCount[#,11,10]>0&] (* _Harvey P. Dale_, Mar 26 2014 *)

%K nonn,base,easy

%O 1,1

%A _Olivier GĂ©rard_