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A009019
Expansion of cos(log(1 + sin(x))).
1
1, 0, -1, 3, -6, 10, -6, -77, 724, -5220, 36364, -259457, 1933704, -15161250, 125278984, -1090268137, 9973751184, -95650827080, 958577301104, -10001308630117, 108164953941664, -1206196891901710, 13774788612312224
OFFSET
0,4
LINKS
MATHEMATICA
With[{nmax = 30}, CoefficientList[Series[Cos[Log[1 + Sin[x]]], {x, 0, nmax}], x]*Range[0, nmax]!] (* G. C. Greubel, Jul 21 2018 *)
PROG
(PARI) x='x+O('x^30); Vec(serlaplace(cos(log(1+sin(x))))) \\ G. C. Greubel, Jul 21 2018
(Magma) m:=30; R<x>:=PowerSeriesRing(Rationals(), m); b:=Coefficients(R!(Cos(Log(1 + Sin(x))))); [Factorial(n-1)*b[n]: n in [1..m]]; // G. C. Greubel, Jul 21 2018
CROSSREFS
Sequence in context: A353199 A138797 A333576 * A198467 A198456 A337602
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
STATUS
approved