login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A012761 Expansion of e.g.f. arctanh(cosh(x) * log(x+1)). 0
0, 1, -1, 7, -24, 203, -1575, 17869, -208152, 2978653, -45883485, 806530811, -15347080848, 321642878919, -7260372461251, 177107309744065, -4619185786492560, 128667734086725657, -3805156334531373561 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..18.

EXAMPLE

x - 1/2!*x^2 + 7/3!*x^3 - 24/4!*x^4 + 203/5!*x^5 ...

MATHEMATICA

Range[0, 20]! CoefficientList[ Series[ ArcTanh[ Cosh[x] Log[x + 1]], {x, 0, 20}], x] (* Robert G. Wilson v, Jul 24 2018 *)

CROSSREFS

Sequence in context: A009650 A111753 A198055 * A209483 A209342 A203117

Adjacent sequences:  A012758 A012759 A012760 * A012762 A012763 A012764

KEYWORD

sign

AUTHOR

Patrick Demichel (patrick.demichel(AT)hp.com)

EXTENSIONS

a(0) inserted and title improved by Sean A. Irvine, Jul 24 2018

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 18 13:54 EDT 2021. Contains 347527 sequences. (Running on oeis4.)