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 A226684 #4 Jun 16 2013 01:13:41 %S A226684 1,17,19,23,121,131,311,313,467,5137,56413,66781,143369 %N A226684 Integer k associated with the conjectured record-breaking maximal element A226683(n) of primitive 3x-k cycles. %Y A226684 Cf. A226668, A226685. %K A226684 nonn %O A226684 1,2 %A A226684 _Geoffrey H. Morley_, Jun 15 2013