%I #16 Mar 31 2019 11:53:19

%S 1,1,1,1,1,1,1,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

%T 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-1,-1,-1,-1,-1,

%U -1,-1,-1,-1,-1,-1,0,0,0,0,0,0,0,0,0

%N Inverse of 671st cyclotomic polynomial.

%C Periodic with period length 671. - _Ray Chandler_, Apr 06 2017

%H Ray Chandler, <a href="/A014680/b014680.txt">Table of n, a(n) for n = 0..1000</a>

%H <a href="/index/Rec#order_600">Index entries for linear recurrences with constant coefficients</a>, order 600.

%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[671,x],{x,0,671}],x] (* _Harvey P. Dale_, Mar 31 2019 *)

%K sign

%O 0,1

%A _Simon Plouffe_