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!)
A013504 sin(sec(x)-sech(x))=2/2!*x^2+2/6!*x^6-176158/10!*x^10... 0
2, 2, -176158, -1468303198, -23972242057918, -659094144077286718, -17783195610659060805598, 2907154691514883581324639842, 1898415071310817291664803882934402, 1068476725686706833449994431404467473282, 726967725616567229436454165277652418918762082 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
MATHEMATICA
With[{nn=50}, Take[CoefficientList[Series[Sin[Sec[x]-Sech[x]], {x, 0, nn}], x] Range[0, nn]!, {3, -1, 4}]] (* Harvey P. Dale, May 28 2021 *)
CROSSREFS
Sequence in context: A262060 A243411 A013510 * A230807 A173012 A083925
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
More terms from N. J. A. Sloane, Dec 17 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 July 18 17:38 EDT 2024. Contains 374388 sequences. (Running on oeis4.)