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 A165486 #3 Mar 31 2012 13:21:19 %S A165486 0,1,4,1,4,1,0,-1,0,1,0,-1,-4,-1,-4,-1,0,1,4,9,4,9,4,1,0,1,4,1,0,-1,0, %T A165486 -1,0,1,4,9,16,25,36,25,16,9,16,9,4,1,0,-1,-4,-1,0,-1,0,1,0,1,0,-1,-4, %U A165486 -9,-4,-9,-16,-25,-16,-25,-16,-25,-16,-9,-4,-1,0,-1,0,-1,0,1,0,1,0,1 %N A165486 Squared version of A165472. %C A165486 Period 65537. %H A165486 A. Karttunen, <a href="/A165486/b165486.txt">Table of n, a(n) for n = 0..65537</a> %Y A165486 Cf. A165487, A165488. %K A165486 sign %O A165486 0,3 %A A165486 _Antti Karttunen_, Sep 21 2009