|
|
A009374
|
|
Expansion of log(1+tan(x))/exp(x).
|
|
5
|
|
|
0, 1, -3, 10, -40, 205, -1287, 9714, -85384, 859889, -9751651, 123102098, -1711387808, 25985945453, -427828028695, 7591346835562, -144408464041712, 2931676572255297, -63262735545686819, 1445955290624608506
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,3
|
|
LINKS
|
|
|
FORMULA
|
a(n) ~ (n-1)! * (-1)^(n+1) * exp(Pi/4) * (4/Pi)^n. - Vaclav Kotesovec, Jan 23 2015
|
|
MATHEMATICA
|
Log[ 1+Tan[ x ] ]/Exp[ x ]
CoefficientList[Series[Log[1 + Tan[x]]/E^x, {x, 0, 20}], x] * Range[0, 20]! (* Vaclav Kotesovec, Jan 23 2015 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
sign,easy
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|