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 A104784 #4 Jan 12 2007 03:00:00 %S A104784 22,10213223,10311233,21322314,21322315,21322316,21322317,21322318, %T A104784 21322319,31123314,31123315,31123316,31123317,31123318,31123319, %U A104784 31331415,31331416,31331417,31331418,31331419,31331516,31331517,31331518 %N A104784 Erroneous version of A047841. %D A104784 J. N. Kapur, Reflections of a Mathematician, Chapter 33, pp. 314-318, Arya Book Depot, New Delhi 1996. %K A104784 dead %O A104784 1,1