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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A009270 Expansion of exp(tanh(x)*sin(x)). 0
1, 2, 0, -98, 1400, 10442, -2400420, 182874382, -11026390960, 272975496722, 101146071584580, -35170244758056938, 8878370234261147000, -2024456851681157735398, 406854219864771946133100 (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[Exp[Tanh[x]*Sin[x]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Mar 15 2018 *)

CROSSREFS

Sequence in context: A009740 A132860 A156485 * A033838 A181373 A046065

Adjacent sequences:  A009267 A009268 A009269 * A009271 A009272 A009273

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 15 2018

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified May 23 16:16 EDT 2018. Contains 304483 sequences. (Running on oeis4.)