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 A133937 #3 Mar 31 2012 14:45:10 %S A133937 0,1,2,2,4,-5,6,4,6,-9,10,-11,12,-13,-14,8,16,-17,18,-19,-20,-21,22, %T A133937 -23,20,-25,18,-27,28,-29,30,16,-32,-33,-34,-35,36,-37,-38,-39,40,-41, %U A133937 42,-43,-44,-45,46,-47,42,-49,-50,-51,52,-53,-54,-55,-56,-57,58,-59,60,-61,-62,32,-64,-65,66,-67,-68,-69,70,-71,72,-73 %N A133937 A100994-n/A014963. %F A133937 a(n) = A100994-n/A014963. %Y A133937 Cf. A100994, A014963. %K A133937 sign %O A133937 1,3 %A A133937 _Mats Granvik_, Jan 21 2008