%I #17 Apr 03 2017 15:15:16

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

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

%U 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0

%N Inverse of 209th cyclotomic polynomial.

%C Periodic with period length 209. - _Ray Chandler_, Apr 03 2017

%H Vincenzo Librandi, <a href="/A014218/b014218.txt">Table of n, a(n) for n = 0..1000</a>

%H <a href="/index/Rec#order_180">Index entries for linear recurrences with constant coefficients</a>, order 180.

%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[209, x], {x, 0, 200}], x] (* _Vincenzo Librandi_, Apr 06 2014 *)

%Y Cf. similar sequences listed in A240328, A240467.

%K sign,easy

%O 0,1

%A _Simon Plouffe_