|
| |
|
|
A009348
|
|
Expansion of e.g.f.: log(1+sinh(tan(x))).
|
|
0
|
|
|
|
0, 1, -1, 5, -18, 121, -792, 7013, -66640, 752785, -9320704, 129763589, -1972346112, 32812992265, -590188526592, 11441858264741, -237543276488704, 5261501926546081, -123809000924250112, 3084889329990554117
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,4
|
|
|
LINKS
|
|
|
|
FORMULA
|
a(n) ~ (n-1)! * (-1)^(n+1) / arctan(log(1+sqrt(2)))^n. - Vaclav Kotesovec, Jan 23 2015
|
|
|
MATHEMATICA
|
With[{nn=20}, CoefficientList[Series[Log[1+Sinh[Tan[x]]], {x, 0, nn}], x] Range[ 0, nn]!] (* Harvey P. Dale, Jul 10 2014 *)
|
|
|
CROSSREFS
|
|
|
|
KEYWORD
|
sign,easy
|
|
|
AUTHOR
|
|
|
|
EXTENSIONS
|
Definition clarified and prior Mathematica program replaced by Harvey P. Dale, Jul 10 2014
|
|
|
STATUS
|
approved
|
| |
|
|
