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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A009627 Expansion of sinh(x)*sin(tan(x)). 1
0, 2, 8, 8, -2304, -183776, -15141248, -1461427328, -166452797440, -21941424508416, -3231615038191616, -498564870033053696, -67544768806700253184, -435077810759086759936, 7017404598452791761076224 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..14.

MATHEMATICA

With[{nn=30}, Take[CoefficientList[Series[Sinh[x]*Sin[Tan[x]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Mar 22 2015 *)

CROSSREFS

Sequence in context: A009666 A012346 A012649 * A009677 A318605 A021350

Adjacent sequences:  A009624 A009625 A009626 * A009628 A009629 A009630

KEYWORD

sign

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

Prior Mathematica program replaced by Harvey P. Dale, Mar 22 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 17 12:45 EDT 2019. Contains 327131 sequences. (Running on oeis4.)