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

 

Logo

Annual Appeal: Please make a donation (tax deductible in USA) to keep the OEIS running. Over 5000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A009027 Expansion of cos(log(1+x))/exp(x). 0
1, -1, 0, 5, -27, 129, -654, 3695, -23475, 166727, -1309684, 11244309, -104234215, 1029821545, -10679924202, 113869873039, -1205722312839, 11744215117935, -79159333236840, -612589942020923, 48022885459499181, -1644758184992095631 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..21.

MATHEMATICA

Cos[ Log[ 1+x ] ]/Exp[ x ]

CROSSREFS

Sequence in context: A129868 A069993 A249995 * A275540 A037498 A198771

Adjacent sequences:  A009024 A009025 A009026 * A009028 A009029 A009030

KEYWORD

sign,easy

AUTHOR

R. H. Hardin

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

License Agreements, Terms of Use, Privacy Policy .

Last modified December 8 04:27 EST 2016. Contains 278902 sequences.