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 A166269 #3 Mar 31 2012 13:21:20 %S A166269 -1,-1,-1,-2,-2,-3,-1,-2,-3,-2,-4,-3,-3,-3,-4,-3,-2,-2,-6,0,-3,-5,-3, %T A166269 -5,-4,-5,-3,-4,-5,-4,-5,-4,-5,-7,-6,-7,-3,-3,0,-4,-8,-4,-4,-5,-2,-6, %U A166269 -5,-6,-7,-8,-6,-4,-6,-9,-6,-8,-6,-4,-4,-4,-11,-7,-4,-11,-4,-9,-6,-7 %N A166269 Bisection 2n+1 of A166050. %C A166269 Conjecture: a(n) = -(1/2) * A166271(n). %H A166269 A. Karttunen, <a href="/A166269/b166269.txt">Table of n, a(n) for n = 0..16383</a> %Y A166269 a(n) = A166050(A005408(n)). %K A166269 sign %O A166269 0,4 %A A166269 _Antti Karttunen_, Oct 13 2009