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 A226682 #6 Jun 18 2013 12:35:17 %S A226682 1,11,17,19,23,131,311,467,3377,5137,66781,76085,143369 %N A226682 Integer k associated with the conjectured record-breaking maximal value A226681(n) of the minimal elements of primitive Collatz-like 3x-k cycles. %Y A226682 Cf. A226666. %K A226682 nonn %O A226682 1,2 %A A226682 _Geoffrey H. Morley_, Jun 16 2013