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 A091243 #8 Mar 31 2012 13:21:09 %S A091243 1,1,2,1,1,2,2,1,1,1,1,2,1,1,1,1,2,1,1,1,1,2,1,1,1,1,2,1,1,2,1,1,1,1, %T A091243 2,1,1,1,1,1,1,2,1,1,2,2,1,1,1,1,2,1,1,1,1,2,1,1,1,1,1,1,1,1,1,1,1,1, %U A091243 2,1,1,2,1,1,1,1,2,1,1,1,1,2,1,1,1,1,2,1,1,1,1,2,2,1,1,1,1,1,1,1,1,1 %N A091243 Differences between consecutive reducible GF(2)[X]-polynomials. %C A091243 Analogous to A073783. %H A091243 A. Karttunen, <a href="/A091247/a091247.scm.txt">Scheme-program for computing this sequence.</a> %H A091243 <a href="/index/Ge#GF2X">Index entries for sequences operating on GF(2)[X]-polynomials</a> %Y A091243 First differences of A091242. a(n) = A091244(n)+1. %K A091243 nonn %O A091243 1,3 %A A091243 _Antti Karttunen_, Jan 03 2004