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!)
A009652 Expansion of tan(log(1+x)/cos(x)). 1
0, 1, -1, 7, -24, 215, -1515, 16721, -176568, 2363165, -32662125, 521810859, -8824531056, 165050184611, -3283420714119, 70591429387077, -1610563051907280, 39183483858949049, -1007242998864835257 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,4
LINKS
MATHEMATICA
With[{nn=20}, CoefficientList[Series[Tan[Log[1+x]/Cos[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Feb 05 2012 *)
CROSSREFS
Sequence in context: A209342 A203117 A197791 * A012777 A074783 A286742
KEYWORD
sign,easy
AUTHOR
EXTENSIONS
Extended with signs by Olivier Gérard, Mar 15 1997
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 March 18 22:34 EDT 2024. Contains 370951 sequences. (Running on oeis4.)