OFFSET
0,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..240
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[Cos[Tan[x]]/Cosh[x], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Feb 12 2015 *)
PROG
(PARI) x='x+O('x^50); v=Vec(serlaplace(cos(tan(x))/cosh(x))); vector(#v\2, n, v[2*n-1]) \\ G. C. Greubel, Jul 24 2018
CROSSREFS
KEYWORD
sign
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
Prior Mathematica program replaced by Harvey P. Dale, Feb 12 2015
STATUS
approved