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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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..100 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:=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 Adjacent sequences: A009094 A009095 A009096 * A009098 A009099 A009100 KEYWORD sign,easy AUTHOR R. H. Hardin EXTENSIONS Extended with signs by Olivier Gérard, Mar 15 1997 Prior Mathematica program replaced by Harvey P. Dale, Jun 24 2014 STATUS approved

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Last modified December 9 23:44 EST 2023. Contains 367696 sequences. (Running on oeis4.)