This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A044958 #8 Nov 21 2013 12:47:04 %S A044958 1,2,3,4,5,6,7,8,10,20,30,40,50,60,70,80,81,82,90,91,92,93,94,95,96, %T A044958 97,98,100,101,109,111,118,121,127,131,136,141,145,151,154,161,162, %U A044958 164,172,173,180,181,182,183,184,185,186,187,188 %N A044958 Numbers with no two equally numerous base 9 digits. %t A044958 Select[Range[200],Min[Differences[Sort[Transpose[Tally[ IntegerDigits[ #,9]]][[2]]]]]>0&] (* _Harvey P. Dale_, Apr 21 2012 *) %K A044958 nonn,base %O A044958 1,2 %A A044958 _Clark Kimberling_