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Periodic with period length 48. - Ray Chandler, Apr 03 2017
<a href="/index/Pol#poly_cyclo_inv">Index to sequences related to inverse of cyclotomic polynomials</a>
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<a href="/index/Rec#order_16">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, -1).
LinearRecurrence[{0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, -1}, {1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0}, 81] (* Ray Chandler, Sep 15 2015 *)
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Vincenzo Librandi, <a href="/A014057/b014057.txt">Table of n, a(n) for n = 0..1000</a>
CoefficientList[Series[1/Cyclotomic[48, x], {x, 0, 100}], x] (* Vincenzo Librandi, Apr 04 2014 *)
Cf. similar sequences listed in A240328.
sign,easy
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Simon Plouffe (simon.plouffe(AT)gmail.com)
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Simon Plouffe (simon.plouffe(AT)math.uqamgmail.cacom)
with(numtheory, cyclotomic); c := n->series(1/cyclotomic(n, x), x, 80);
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