OFFSET
0,2
COMMENTS
Note that a(15) is negative. - Vaclav Kotesovec, Feb 07 2015
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 0..200
MATHEMATICA
nn = 20; Table[(CoefficientList[Series[Tan[ArcTan[x]*Cosh[x]], {x, 0, 2*nn+1}], x] * Range[0, 2*nn+1]!)[[n]], {n, 2, 2*nn, 2}] (* Vaclav Kotesovec, Feb 07 2015 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved