A240353 - OEIS

%I #8 Apr 03 2017 13:40:09

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

%T -1,0,-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,

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

%N Inverse of 68th cyclotomic polynomial.

%C Periodic with period length 68. - _Ray Chandler_, Apr 03 2017

%H Vincenzo Librandi, <a href="/A240353/b240353.txt">Table of n, a(n) for n = 0..1000</a>

%H <a href="/index/Rec#order_32">Index entries for linear recurrences with constant coefficients</a>, signature (0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, -1).

%H <a href="/index/Pol#poly_cyclo_inv">Index to sequences related to inverse of cyclotomic polynomials</a>

%t CoefficientList[Series[1/Cyclotomic[68, x], {x, 0, 200}], x]

%Y Cf. similar sequences listed in A240328.

%K sign,easy

%O 0

%A _Vincenzo Librandi_, Apr 04 2014