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 A128931 #1 May 11 2007 03:00:00 %S A128931 2,3,98,120 %N A128931 Erroneous version of A126203. %D A128931 L. E. Dickson, History of the Theory of Numbers, Volume 2, Chapter 21, page 587. %D A128931 E. Lucas, Recherches sur l'analyse indeterminee, Moulins, 1873, 92. Extract from Bull. Soc. d'Emulation du Departement de l'Allier, 12, 1873, 532. %K A128931 dead %O A128931 1,1