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 A086129 #4 Sep 22 2004 03:00:00 %S A086129 26724377,121967987,128975057,161184857,190148267,234742187,257637647 %N A086129 Erroneous version of A023347. %K A086129 dead %O A086129 1,1