OFFSET
0,2
MATHEMATICA
Table[n!*SeriesCoefficient[-ArcTanh[Log[Cos[x]]], {x, 0, n}], {n, 2, 40, 2}] (* Vaclav Kotesovec, Oct 25 2013 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved