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 A226666 #6 Jun 18 2013 12:35:31 %S A226666 1,5,29,343,551,3607,3787,4501,7097,14303,17021,30809,85105,103645, %T A226666 158195,215663,323399 %N A226666 Integer k associated with the conjectured record-breaking maximal value A226665(n) of the minimal elements of primitive Collatz-like 3x+k cycles. %Y A226666 Cf. A226682. %K A226666 nonn %O A226666 1,2 %A A226666 _Geoffrey H. Morley_, Jun 16 2013