A039448 - OEIS

%I #11 Jun 30 2021 04:31:08

%S 13,23,123,143,146,147,148,149,150,151,152,153,156,167,178,189,200,

%T 211,222,233,243,253,256,257,258,259,260,261,262,263,276,287,298,309,

%U 320,331,342,353,376,386,497,507,618,628,739,749,860,870,981,991,1102

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

%K nonn,base,easy

%O 1,1

%A _Olivier Gérard_