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 A093551 #3 May 11 2007 03:00:00 %S A093551 2,3,61,193,15121,838561,807905281,23066039641 %N A093551 Erroneous version of A072875. %K A093551 dead %O A093551 1,1