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 A178559 #3 Mar 31 2012 10:26:16 %S A178559 13,223,2333,44449,555557,16666669,77767777,888888883,9199999999 %N A178559 Smallest prime using the digit n exactly n times. %F A178559 a(n) = A069569(n), n=1..9. [From _R. J. Mathar_, May 31 2010] %Y A178559 A178550-A178558 %K A178559 fini,full,nonn,base %O A178559 1,1 %A A178559 _Lekraj Beedassy_, May 29 2010