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!)
A012729 arcsin(arctanh(x)*arctan(x))=2/2!*x^2+328/6!*x^6+1402272/10!*x^10... 0
2, 328, 1402272, 34476662400, 2862572968849920, 606547177566513039360, 275433333396552433711226880, 237761902453820639998996848476160 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..7.

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[ArcSin[ArcTanh[x]*ArcTan[x]], {x, 0, nn}], x] Range[0, nn]!, {3, -1, 4}]] (* Ray Chandler, Nov 28 2016 *)

CROSSREFS

Sequence in context: A282430 A012601 A012606 * A173750 A088250 A142355

Adjacent sequences:  A012726 A012727 A012728 * A012730 A012731 A012732

KEYWORD

nonn

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 January 27 12:01 EST 2020. Contains 331295 sequences. (Running on oeis4.)