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

 

Logo

Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A091019 Denominators of the Taylor series of ArcCosh[z]/Sqrt[2(x-1)] about 1. 0
1, 12, 160, 896, 18432, 90112, 851968, 1310720, 142606336, 637534208, 5637144576, 24696061952, 429496729600, 1855425871872, 15942918602752, 68169720922112, 1548112371908608, 3940649673949184, 166633186212708352 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Numerators are A055786.

LINKS

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

Eric Weisstein's World of Mathematics, Inverse Hyperbolic Cosecant

EXAMPLE

ArcCosh[z] = 1 + (1 - z)/12 + (3*(-1 + z)^2)/160 - (5*(-1 + z)^3)/896 + (35*(-1 + z)^4)/18432 - (63*(-1 + z)^5)/90112 + ...

CROSSREFS

Cf. A055786.

Sequence in context: A213376 A226297 A112719 * A219418 A098400 A208791

Adjacent sequences:  A091016 A091017 A091018 * A091020 A091021 A091022

KEYWORD

nonn

AUTHOR

Eric W. Weisstein, Dec 13, 2003

STATUS

approved

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

Content is available under The OEIS End-User License Agreement .

Last modified October 1 18:21 EDT 2014. Contains 247521 sequences.