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 A011646 #13 Apr 02 2017 09:55:59 %S A011646 1,-1,0,1,-1,0,1,-1,0,1,-1,0,1,-1,0,1,-1,0,1,-1,0,1,-1,0,1,-1,0,1,-1, %T A011646 0,1,0,-1,1,0,-1,1,0,-1,1,0,-1,1,0,-1,1,0,-1,1,0,-1,1,0,-1,1,0,-1,1,0, %U A011646 -1,1 %N A011646 93rd cyclotomic polynomial. %H A011646 <a href="/index/Pol#poly_cyclo">Index to sequences related to cyclotomic polynomials</a> %t A011646 CoefficientList[Cyclotomic[93,x],x] (* _Ray Chandler_, Sep 15 2015 *) %K A011646 sign,fini,full %O A011646 0,1 %A A011646 _N. J. A. Sloane_