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 A104787 #6 Mar 31 2012 10:26:04 %S A104787 0,22,0,0,0,0,0,31331819,0,3122331819,0,0,0,41322324171819,0, %T A104787 5132232516171819,0,613223141526171819,1111213141516171819, %U A104787 10713223141516271819,101112213141516171819 %N A104787 a(n) = greatest member of A047841 with n digits, or 0 if no such number exists. %Y A104787 Cf. A047841, A104785, A104786, A039616, A039617. %K A104787 fini,full,nonn,base %O A104787 1,2 %A A104787 _Lekraj Beedassy_, Mar 25 2005 %E A104787 Edited by _David Wasserman_, Apr 17 2008