A015670 Inverse of 1661st cyclotomic polynomial.

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, 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 1661. - Ray Chandler, Apr 07 2017

Links

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

Index entries for periodic sequences, period 1661.

Index entries for linear recurrences with constant coefficients, order 1500.

Index to sequences related to inverse of cyclotomic polynomials

Maple

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

Mathematica

Flatten[PadRight[{CoefficientList[Series[1/Cyclotomic[1661, x], {x, 0, 11}], x]}, 100, 0]] (* Harvey P. Dale, Nov 26 2015 *)

Prog

(PARI) first(n)=Vec(1/polcyclo(1661)+O(x^(n+1))) \\ Charles R Greathouse IV, Jun 01 2026

Crossrefs

Sequence in context: A015516 A015538 A015648 * A015736 A015802 A015835

Adjacent sequences: A015667 A015668 A015669 * A015671 A015672 A015673

Keyword

sign,easy,changed

Author

Simon Plouffe

Status

approved