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 A228006 #16 Aug 09 2013 17:56:32 %S A228006 10,111,12,1113,4,15,6,117,8,9 %N A228006 Smallest composite numbers with multiplicative digital root value 0 <= n <= 9. %Y A228006 Cf. A198487, A198378 (smallest prime with multiplicative digital root 0 <= n <= 9). %K A228006 nonn,base,fini,full %O A228006 0,1 %A A228006 _Jaroslav Krizek_, Aug 08 2013