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!)
A012386 sech(tan(x)*arcsin(x))=1-12/4!*x^4-360/6!*x^6-7280/8!*x^8... 0
1, 0, -12, -360, -7280, 504000, 121581504, 14369939584, 56810973440, -657138821830656, -255226784793623552, -45397358372525164544, 15722139759017802895360, 20152649683846086682296320 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
CROSSREFS
Sequence in context: A012553 A128043 A012431 * A130213 A012633 A009079
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 | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 3 22:46 EDT 2023. Contains 363116 sequences. (Running on oeis4.)