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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A012568 arctanh(sinh(x)*cos(x))=x-20/5!*x^5-560/7!*x^7-7920/9!*x^9... 0
1, 0, -20, -560, -7920, 1034880, 172569280, 12339608320, -1902800305920, -1037015219466240, -208832669083243520, 24402030281141555200, 43057075784745711636480, 18939654540025835056496640 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..13.

FORMULA

a(n) = A009357(2n+1). - R. J. Mathar, Mar 17 2007

CROSSREFS

Cf. A009357.

Sequence in context: A202920 A210486 A047682 * A184123 A027407 A116218

Adjacent sequences:  A012565 A012566 A012567 * A012569 A012570 A012571

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 | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

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

Last modified May 25 10:57 EDT 2013. Contains 225647 sequences.