A014877 - OEIS

%I #13 Dec 16 2021 16:18:50

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

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

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

%N Inverse of 868th cyclotomic polynomial.

%C Periodic with period length 868. - _Ray Chandler_, Apr 06 2017

%H Ray Chandler, <a href="/A014877/b014877.txt">Table of n, a(n) for n = 0..1000</a>

%H <a href="/index/Rec#order_360">Index entries for linear recurrences with constant coefficients</a>, order 360.

%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[868,x],{x,0,100}],x,100] (* _Harvey P. Dale_, Dec 16 2021 *)

%K sign

%O 0,1

%A _Simon Plouffe_