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 A014856 #13 Apr 06 2017 14:52:44 %S A014856 1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1, %T A014856 0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,1,0, %U A014856 0,0,0,0,0,0,0,0,0,0,0,0,0 %N A014856 Inverse of 847th cyclotomic polynomial. %C A014856 Periodic with period length 847. - _Ray Chandler_, Apr 06 2017 %H A014856 Ray Chandler, <a href="/A014856/b014856.txt">Table of n, a(n) for n = 0..1000</a> %H A014856 <a href="/index/Rec#order_660">Index entries for linear recurrences with constant coefficients</a>, order 660. %H A014856 <a href="/index/Pol#poly_cyclo_inv">Index to sequences related to inverse of cyclotomic polynomials</a> %p A014856 with(numtheory,cyclotomic); c := n->series(1/cyclotomic(n, x), x,80); c(847); %K A014856 sign %O A014856 0,1 %A A014856 _Simon Plouffe_