OFFSET
0,1
COMMENTS
Periodic with period length 420. - Ray Chandler, Apr 04 2017
LINKS
Ray Chandler, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (0, 1, 0, -1, 0, 0, 0, 0, 0, -1, 0, 1, 0, -2, 0, 1, 0, -1, 0, 0, 0, 0, 0, -1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, -1, 0, 1, 0, -1, 0, 1, 0, -1, 0, 0, 0, 0, 0, -1, 0, 1, 0, -2, 0, 1, 0, -1, 0, 0, 0, 0, 0, -1, 0, 1, 0, -1).
MAPLE
with(numtheory, cyclotomic); c := n->series(1/cyclotomic(n, x), x, 80);
MATHEMATICA
CoefficientList[Series[1/Cyclotomic[420, x], {x, 0, 120}], x] (* Harvey P. Dale, Jul 24 2017 *)
CROSSREFS
KEYWORD
sign
AUTHOR
STATUS
approved