Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #16 Mar 18 2018 10:31:47
%S 1,0,0,-1,0,0,0,0,0,1,0,0,-1,0,0,0,0,0,1,0,0,0,0,0,-1,0,0,1,0,0,0,0,0,
%T 0,0,0,0,0,0,0,0,0,1,0,0,-1,0,0,0,0,0,1,0,0,0,0,0,-1,0,0,1,0,0,0,0,0,
%U 0,0,0,0,0,0,0,0,0,1,0,0,-1,0,0
%N Inverse of 693rd cyclotomic polynomial.
%C Periodic with period length 693. - _Ray Chandler_, Apr 06 2017
%H Ray Chandler, <a href="/A014702/b014702.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[693,x],{x,0,120}],x] (* _Harvey P. Dale_, Mar 18 2018 *)
%K sign
%O 0,1
%A _Simon Plouffe_