OFFSET
0,4
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..250
FORMULA
E.g.f.: cos(tanh(x)*exp(x)).
MAPLE
seq(coeff(series(factorial(n)*cos(tanh(x)*exp(x)), x, n+1), x, n), n=0..25); # Muniru A Asiru, Jul 26 2018
MATHEMATICA
With[{nmax = 30}, CoefficientList[Series[Cos[Tanh[x]*Exp[x]], {x, 0, nmax}], x]*Range[0, nmax]!] (* G. C. Greubel, Jul 25 2018 *)
PROG
(PARI) x='x+O('x^30); Vec(serlaplace(cos(tanh(x)*exp(x)))) \\ G. C. Greubel, Jul 25 2018
(Magma) m:=30; R<x>:=PowerSeriesRing(Rationals(), m); b:=Coefficients(R!(Cos(Tanh(x)*Exp(x)))); [Factorial(n-1)*b[n]: n in [1..m]]; // G. C. Greubel, Jul 25 2018
CROSSREFS
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
STATUS
approved