OFFSET
0,2
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 0..200
FORMULA
Limit n->infinity (|a(n)|/(2*n)!)^(1/(2*n)) = 1.472999955676005806224549179660050772... - Vaclav Kotesovec, Nov 01 2013
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[ArcSinh[Tanh[x]*Cos[x]], {x, 0, nn}], x]Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, Dec 13 2012 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved