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%I #16 Jul 02 2021 11:03:14
%S 1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,
%T -1,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,-1,0,1,
%U 0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1,0,1,0,-1
%N Inverse of 1972nd cyclotomic polynomial.
%C Periodic with period length 1972. - _Ray Chandler_, Apr 07 2017
%H Ray Chandler, <a href="/A015981/b015981.txt">Table of n, a(n) for n = 0..2000</a>
%H <a href="/index/Rec#order_896">Index entries for linear recurrences with constant coefficients</a>, order 896.
%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[1972,x],{x,0,120}],x] (* _Harvey P. Dale_, Jul 02 2021 *)
%K sign
%O 0,1
%A _Simon Plouffe_
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