%I #16 Aug 19 2020 15:34:10
%S 1,0,0,-1,0,0,0,0,0,1,0,0,-1,0,0,0,0,0,1,0,0,-1,0,0,0,0,0,1,0,0,-1,0,
%T 0,1,0,0,0,0,0,-1,0,0,1,0,0,0,0,0,-1,0,0,2,0,0,-1,0,0,-1,0,0,2,0,0,-1,
%U 0,0,0,0,0,1,0,0,-1,0,0,0,0,0,1,0,0
%N Inverse of 1683rd cyclotomic polynomial.
%C Periodic with period length 1683. - _Ray Chandler_, Apr 07 2017
%H Ray Chandler, <a href="/A015692/b015692.txt">Table of n, a(n) for n = 0..2000</a>
%H <a href="/index/Rec#order_960">Index entries for linear recurrences with constant coefficients</a>, order 960.
%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[1683,x],{x,0,120}],x] (* _Harvey P. Dale_, Aug 19 2020 *)
%K sign
%O 0,52
%A _Simon Plouffe_