%I #17 Apr 07 2017 20:29:23
%S 1,-1,0,1,-1,0,1,-1,0,1,-1,0,1,-1,0,1,-1,1,0,-1,1,0,-1,1,0,-1,1,0,-1,
%T 1,0,-1,1,0,0,0,0,0,0,0,0,1,-1,0,1,-1,0,1,-1,0,1,-1,0,1,-1,0,1,-1,1,0,
%U -1,1,0,-1,1,0,-1,1,0,-1,1,0,-1,1,0,0,0,0,0,0,0
%N Inverse of 2091st cyclotomic polynomial.
%C Periodic with period length 2091. - _Ray Chandler_, Apr 07 2017
%H Ray Chandler, <a href="/A016100/b016100.txt">Table of n, a(n) for n = 0..3000</a>
%H <a href="/index/Rec#order_1280">Index entries for linear recurrences with constant coefficients</a>, order 1280.
%H <a href="/index/Pol#poly_cyclo_inv">Index to sequences related to inverse of cyclotomic polynomials</a>
%p with(numtheory,cyclotomic); c := n->series(1/cyclotomic(n,x),x,80);
%t CoefficientList[Series[1/Cyclotomic[2091,x],{x,0,100}],x] (* _Harvey P. Dale_, Apr 03 2011 *)
%K sign
%O 0,1
%A _Simon Plouffe_