A014902 - OEIS

%I #18 Jun 01 2026 19:25:28

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

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

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

%N Inverse of 893rd cyclotomic polynomial.

%C Periodic with period length 893. - _Ray Chandler_, Apr 06 2017

%H Ray Chandler, <a href="/A014902/b014902.txt">Table of n, a(n) for n = 0..1000</a>

%H <a href="/index/Per#periodic">Index entries for periodic sequences</a>, period 893.

%H <a href="/index/Rec#order_828">Index entries for linear recurrences with constant coefficients</a>, order 828.

%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[893,x],{x,0,100}],x,90] (* _Harvey P. Dale_, Nov 29 2020 *)

%o (PARI) first(n)=Vec(1/polcyclo(893)+O(x^(n+1))) \\ _Charles R Greathouse IV_, Jun 01 2026

%K sign,easy,changed

%O 0,1

%A _Simon Plouffe_