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 A088517 #14 Jul 13 2013 12:03:02 %S A088517 1,0,1,0,1,0,0,1,0,0,1,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,1,0,0,0,0,1,0, %T A088517 0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0, %U A088517 1,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0 %N A088517 First differences of Golomb's sequence. %C A088517 Characteristic function of A001463 %H A088517 Reinhard Zumkeller, <a href="/A088517/b088517.txt">Table of n, a(n) for n = 1..10000</a> %H A088517 <a href="/index/Ch#char_fns">Index entries for characteristic functions</a> %F A088517 a(n)=A001462(n+1)-A001462(n); a(A001463(n))=1 %o A088517 (Haskell) %o A088517 a088517 n = a001462 (n + 1) - a001462 n %o A088517 a088517_list = zipWith (-) (tail a001462_list) a001462_list %o A088517 -- _Reinhard Zumkeller_, Apr 28 2012 %K A088517 nonn %O A088517 1,1 %A A088517 _Benoit Cloitre_, Nov 14 2003