login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A012967 E.g.f.: tanh(arctan(x)+log(x+1))=2*x-1/2!*x^2-16/3!*x^3+42/4!*x^4+500/5!*x^5... 1
0, 2, -1, -16, 42, 500, -3210, -31960, 409640, 3197360, -78190200, -405352000, 20714298000, 39783504800, -7213870190800, 15836666456000, 3165414330000000, -23690623723936000, -1688397526908144000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..100

MATHEMATICA

With[{nn=20}, CoefficientList[Series[Tanh[ArcTan[x]+Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Mar 11 2014 *)

CROSSREFS

Sequence in context: A113108 A162005 A013125 * A013121 A012963 A013120

Adjacent sequences:  A012964 A012965 A012966 * A012968 A012969 A012970

KEYWORD

sign

AUTHOR

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

EXTENSIONS

Zero prepended and definition clarified by Harvey P. Dale, Mar 11 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 | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified February 22 19:36 EST 2018. Contains 299469 sequences. (Running on oeis4.)