A009408 - OEIS

%I #18 Jun 23 2015 21:38:32

%S 0,1,-1,-1,0,-31,75,-953,3976,-41631,255375,-2595825,21904344,

%T -229744191,2548875147,-28954555113,403320390960,-5182050779583,

%U 86114063275263,-1283638256263905,24297343149251280,-420632032451656671

%N Expansion of log(1+x)*cos(tan(x)).

%F a(n) ~ (n-1)! * (-1)^(n+1) * cos(tan(1)). - _Vaclav Kotesovec_, Jan 24 2015

%t With[{nn=30},CoefficientList[Series[Log[1+x]Cos[Tan[x]],{x,0,nn}],x] Range[0,nn]!] (* _Harvey P. Dale_, Mar 11 2012 *)

%K sign,easy

%O 0,6

%A _R. H. Hardin_

%E Extended with signs by _Olivier Gérard_, Mar 15 1997