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 A198378 #13 Mar 30 2012 19:00:25 %S A198378 59,11,2,3,41,5,23,7,29,19 %N A198378 Smallest prime with multiplicative digital root value 0 <= n <= 9. %Y A198378 Cf. A107698, A198487. %K A198378 nonn,base,fini,full %O A198378 0,1 %A A198378 _Jaroslav Krizek_, Oct 23 2011