The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A009172 Expansion of e.g.f.: cosh(tanh(x)*log(1+x)). 0
1, 0, 0, 0, 12, -60, 90, -420, 12320, -124992, 753480, -6481200, 110644776, -1613081184, 18917874976, -250425171360, 4359533351680, -78311204695424, 1329852024578496, -23869209971687040, 483284209880289152 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,5
LINKS
MATHEMATICA
With[{nn=20}, CoefficientList[Series[Cosh[Tanh[x]Log[1+x]], {x, 0, nn}], x] Range[ 0, nn]!] (* Harvey P. Dale, Apr 25 2014 *)
CROSSREFS
Sequence in context: A012407 A009093 A012400 * A012405 A012657 A012406
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
Definition clarified and prior Mathematica program replaced by Harvey P. Dale, Apr 25 2014
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 27 23:57 EDT 2024. Contains 372900 sequences. (Running on oeis4.)