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!)
A013159 arctan(arctanh(x)+log(x+1))=2*x-1/2!*x^2-12/3!*x^3+42/4!*x^4+436/5!*x^5... 2
0, 2, -1, -12, 42, 436, -4170, -32704, 751016, 3283072, -209162880, 86913024, 81648502848, -575015877024, -41409311392176, 689874309603456, 25412078270229120, -812967446932685568, -17148064731893670528 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

MATHEMATICA

With[{nn=30}, CoefficientList[Series[ArcTan[ArcTanh[x]+Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Ray Chandler, Nov 29 2016 *)

CROSSREFS

Sequence in context: A009821 A009831 A012931 * A012590 A012291 A012585

Adjacent sequences:  A013156 A013157 A013158 * A013160 A013161 A013162

KEYWORD

sign

AUTHOR

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

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 July 11 20:03 EDT 2020. Contains 335652 sequences. (Running on oeis4.)