%I #15 Sep 24 2022 11:27:43
%S 1,-1,0,1,-1,1,0,-1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
%T 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
%U 0,0,0,0,0,0,0,0,0,0,0,0,0,0
%N Inverse of 1245th cyclotomic polynomial.
%C Periodic with period length 1245. - _Ray Chandler_, Apr 07 2017
%H Ray Chandler, <a href="/A015254/b015254.txt">Table of n, a(n) for n = 0..2000</a>
%H <a href="/index/Rec#order_656">Index entries for linear recurrences with constant coefficients</a>, order 656.
%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[1245,x],{x,0,120}],x] (* _Harvey P. Dale_, Sep 24 2022 *)
%o (PARI) Vec(1/polcyclo(1245)+O(x^99)) \\ _Charles R Greathouse IV_, Mar 24 2014
%K sign
%O 0,1
%A _Simon Plouffe_