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A009097
Expansion of e.g.f. cos(x)*cos(log(1+x)).
1
1, 0, -2, 3, -3, 10, -56, 315, -1971, 13788, -105246, 857615, -7266223, 61296222, -465353292, 1982748495, 36246192441, -1600097656520, 43901543199046, -1078930450441413, 25757481055625541, -615789512284527630
OFFSET
0,3
LINKS
MATHEMATICA
With[{nn=30}, CoefficientList[Series[Cos[x]*Cos[Log[1+x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jun 24 2014 *)
PROG
(PARI) x='x+O('x^30); Vec(serlaplace(cos(x)*cos(log(1+x)))) \\ G. C. Greubel, Jul 26 2018
(Magma) m:=30; R<x>:=PowerSeriesRing(Rationals(), m); b:=Coefficients(R!(Cos(x)*Cos(Log(1+x)))); [Factorial(n-1)*b[n]: n in [1..m]]; // G. C. Greubel, Jul 26 2018
CROSSREFS
Sequence in context: A152300 A117030 A155758 * A210194 A210755 A219224
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
Prior Mathematica program replaced by Harvey P. Dale, Jun 24 2014
STATUS
approved