A015290 Inverse of 1281st cyclotomic polynomial.

1, -1, 0, 1, -1, 0, 1, 0, -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, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -1, 0, 1, -1, 0, 1, 0, -1, 1, 0, -1, 1, 0, 0, 0, 0, 0, 0, 0

Offset

0,1

Comments

Periodic with period length 1281. - Ray Chandler, Apr 07 2017

Links

Ray Chandler, Table of n, a(n) for n = 0..2000

Index entries for periodic sequences, period 1281.

Index entries for linear recurrences with constant coefficients, order 720.

Index to sequences related to inverse of cyclotomic polynomials

Maple

with(numtheory, cyclotomic); c := n->series(1/cyclotomic(n, x), x, 80);

Mathematica

CoefficientList[Series[1/Cyclotomic[1281, x], {x, 0, 120}], x, 120] (* Harvey P. Dale, Dec 12 2020 *)

Prog

(PARI) first(n)=Vec(1/polcyclo(1281)+O(x^(n+1))) \\ Charles R Greathouse IV, Jun 01 2026

Crossrefs

Sequence in context: A015542 A015500 A015416 * A015248 A015122 A016235

Adjacent sequences: A015287 A015288 A015289 * A015291 A015292 A015293

Keyword

sign,easy,changed

Author

Simon Plouffe

Status

approved