A015997 Inverse of 1988th cyclotomic polynomial.

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

Offset

0,1

Comments

Periodic with period length 1988. - Ray Chandler, Apr 07 2017

Links

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

Index entries for periodic sequences, period 1988.

Index entries for linear recurrences with constant coefficients, order 840.

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[1988, x], {x, 0, 143}], x] (* Harvey P. Dale, Dec 30 2018 *)

Prog

(PARI) first(n)=Vec(1/polcyclo(1988)+O(x^(n+1))) \\ Charles R Greathouse IV, Jun 01 2026

Crossrefs

Sequence in context: A015661 A015717 A015885 * A016053 A016221 A015045

Adjacent sequences: A015994 A015995 A015996 * A015998 A015999 A016000

Keyword

sign,easy,changed

Author

Simon Plouffe

Status

approved