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 A178724 #5 Mar 31 2012 14:41:47 %S A178724 13,15,25,31,33,35,37,38,39,45,47,48,49,51,53,55,57,58,59,61,63,65,71, %T A178724 72,73,74,75,81,82,83,84,85,91,92,93,94,95,105,106,108,109,113,115, %U A178724 116,117,118,119,125,126,127,128 %N A178724 Nonnegative integers whose English name has at least one letter in common with the English name of all other integers. %e A178724 The first entry is 13; one or more of the letters in the word "thirteen" appear in the English name of every integer. 14 is not in the list because "fourteen" has no letters in common with "six." %K A178724 nonn,word %O A178724 1,1 %A A178724 _Will Nicholes_, Jun 07 2010