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 A160351 #8 Apr 05 2014 09:54:35 %S A160351 0,0,0,1,0,0,0,1,0,1,0,1,0,1,0,1,0,0,0,1,0,1,1,0,1,0,1,0,1,0,1,0,0,0, %T A160351 1,0,1,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,0,0,1, %U A160351 0,1,0,1,0,1,0,1,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,0,0,1,0,1 %N A160351 Characteristic function of A057166. %H A160351 <a href="/index/Rea#Recaman">Index entries for sequences related to Recamán's sequence</a> %F A160351 a(n) = (1-A160357(n))/2 = 1-A076213(n-1). %K A160351 nonn %O A160351 1,1 %A A160351 _M. F. Hasler_, Jun 03 2009