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 A020519 #23 Apr 06 2016 06:33:44
%S A020519 11,2047,1398101,1227133513,1172812402961,1162219258676257,
%T A020519 1171221845949812801,1189887617730934227073,1213666705181745367548161,
%U A020519 1240362622532514091484054017,1268889750375080065623288448001,1298708349570020393652962442872833
%N A020519 11th cyclotomic polynomial evaluated at powers of 2.
%H A020519 Harvey P. Dale, <a href="/A020519/b020519.txt">Table of n, a(n) for n = 0..332</a>
%H A020519 Quynh Nguyen, Jean Pedersen, and Hien T. Vu, <a href="https://cs.uwaterloo.ca/journals/JIS/VOL19/Pedersen/pedersen2.html">New Integer Sequences Arising From 3-Period Folding Numbers</a>, Vol. 19 (2016), Article 16.3.1. Cites this sequence.
%F A020519 G.f.: -(72022409665839104*x^10 -95936100375199744*x^9 +41035167933923328*x^8 -7266644321632256*x^7 +581441424424960*x^6 -21804053415936*x^5 +388080675136*x^4 -3261182144*x^3 +12564486*x^2 -20470*x +11) / ((x -1)*(2*x -1)*(4*x -1)*(8*x -1)*(16*x -1)*(32*x -1)*(64*x -1)*(128*x -1)*(256*x -1)*(512*x -1)*(1024*x -1)). - _Colin Barker_, Feb 14 2015
%F A020519 a(n) = 1+2^n+4^n+8^n+16^n+32^n+64^n+128^n+256^n+512^n+1024^n. - _Colin Barker_, Feb 15 2015
%F A020519 a(n) = A060885(A000079(n)). - _Michel Marcus_, Apr 06 2016
%p A020519 with(numtheory,cyclotomic):seq(cyclotomic(11,2^i),i=0..24);
%t A020519 Table[Total[x^Range[0,10]],{x,2^Range[0,10]}] (* _Harvey P. Dale_, Mar 05 2014 *)
%o A020519 (PARI) a(n) = polcyclo(11, 2^n); \\ _Michel Marcus_, Apr 12 2014
%Y A020519 Cf. A000079, A060885.
%K A020519 nonn,easy
%O A020519 0,1
%A A020519 _Simon Plouffe_