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!)
A012360 Expansion of e.g.f.: sech(tan(x)*log(x+1))=1-12/4!*x^4+60/5!*x^5-570/6!*x^6+3780/7!*x^7... 0
1, 0, 0, 0, -12, 60, -570, 3780, -26880, 145152, 67800, -19702320, 483806664, -8808530016, 143791860576, -2098017710880, 26000312931840, -200354333649536, -2365679417115840, 173236427161446528 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..19.

MATHEMATICA

With[{nn=20}, CoefficientList[Series[Sech[Tan[x]Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Nov 29 2018 *)

CROSSREFS

Sequence in context: A012517 A012314 A233004 * A012708 A009077 A012702

Adjacent sequences:  A012357 A012358 A012359 * A012361 A012362 A012363

KEYWORD

sign

AUTHOR

Patrick Demichel (patrick.demichel(AT)hp.com)

EXTENSIONS

Definition clarified by Harvey P. Dale, Nov 29 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 25 03:39 EDT 2022. Contains 354047 sequences. (Running on oeis4.)