login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A012868 Numerators of coefficients in Taylor series expansion of log(cotan(x)*arcsinh(x)). 1
0, -1, -1, -1, 347, -1531, 590267, -37723537, 1103996977, -2158074791, 328785573754709, -134852375996381, 3427455470023873621, -13844935285148389217, 6142449451071240707, -43761094586606903148089, 37938502177281712935274975819, -110450564689571423030247983611, 4389621268440117526955711378765711 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

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

EXAMPLE

-1/2*x^2-1/60*x^4-1/18*x^6+347/22680*x^8-1531/85050*x^10+590267/52123500*x^12+...

CROSSREFS

Cf. A202622.

Sequence in context: A343701 A142369 A190814 * A343303 A226669 A226665

Adjacent sequences: A012865 A012866 A012867 * A012869 A012870 A012871

KEYWORD

sign,frac

AUTHOR

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

EXTENSIONS

Corrected by N. J. A. Sloane, Dec 21 2011

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 7 04:29 EST 2022. Contains 358649 sequences. (Running on oeis4.)