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 A161369 #9 Feb 16 2014 18:38:04 %S A161369 -1,-1,0,0,-1,0,1,-1,0,0,-1,0,-1,0,0,0,1,-1,2,0,0,1,-1,0,-1,2,0,0,2,0, %T A161369 1,-1,0,2,0,0,3,1,-1,0,-1,0,2,0,0,-1,2,0,1,-1,2,0,-1,0,0,0,3,1,-1,0, %U A161369 -1,2,0,2,0,0,1,-1,2,0,1,-1 %N A161369 a(n) = A161359(n) - n. %K A161369 sign,more %O A161369 1,19 %A A161369 _R. H. Hardin_ and _N. J. A. Sloane_, Nov 27 2009 %E A161369 Extended using A161359 terms by _Michel Marcus_, Feb 16 2014