OFFSET
0,3
FORMULA
a(n) ~ n! / ((exp(r) + sin(r)) * r^(n+1)), where r = 0.814158996828781376878265969211452855533947645871032054776582... is the root of the equation exp(r)-cos(r) = Pi/2. - Vaclav Kotesovec, Feb 06 2015
MATHEMATICA
With[{nn=20}, CoefficientList[Series[Tan[Exp[x]-Cos[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Nov 24 2011 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved