OFFSET
0,3
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..250
MATHEMATICA
With[{nmax = 60}, CoefficientList[Series[Cos[x*Cosh[x]], {x, 0, nmax}], x]*Range[0, nmax]!][[1 ;; -1 ;; 2]] (* G. C. Greubel, Jul 21 2018 *)
PROG
(PARI) x='x+O('x^60); v=Vec(serlaplace(cos(x*cosh(x)))); vector(#v\2, n, v[2*n-1]) \\ G. C. Greubel, Jul 21 2018
CROSSREFS
KEYWORD
sign
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
STATUS
approved