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 A115870 #5 Mar 31 2012 13:21:10 %S A115870 0,0,0,3,0,7,5,0,0,15,13,15,9,15,13,11,0,31,29,35,25,27,0,23,17,0,45, %T A115870 19,25,23,21,27,0,63,61,63,57,59,61,55,49,51,61,51,57,43,53,59,33,55, %U A115870 45,35,41,39,37,47,49,47,45,47,41,47,45,43,0 %N A115870 Terms at odd positions of A115869. %H A115870 <a href="/index/Con#CongruCrossDomain">Index entries for sequences defined by congruent products between domains N and GF(2)[X]</a> %Y A115870 Bisection of A115869. %K A115870 nonn %O A115870 1,4 %A A115870 _Antti Karttunen_, Feb 07 2006