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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A024230 Expansion of sin(x)*sin(sinh(x))/2. 0
0, 1, -2, -21, -4, 2677, 49978, 11487, -36275464, -1538399639, -22119645578, 2006421812307, 213180133008116, 10489769063373277, -27722182352718926, -68871270400638150585, -8464386105916692002320, -535985815068329924418863 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
MATHEMATICA
With[{nn=40}, Take[CoefficientList[Series[Sin[x]*Sin[Sinh[x]]/2, {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Dec 05 2015 *)
CROSSREFS
Cf. A009547.
Sequence in context: A100980 A360980 A122509 * A358520 A105666 A058261
KEYWORD
sign
AUTHOR
EXTENSIONS
Extended with signs Mar 1997
Prior Mathematica program replaced by Harvey P. Dale, Dec 05 2015
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 June 21 13:19 EDT 2024. Contains 373544 sequences. (Running on oeis4.)