login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A012444
exp(arctan(x)*tan(x))=1+2/2!*x^2+12/4!*x^4+280/6!*x^6+7952/8!*x^8...
0
1, 2, 12, 280, 7952, 532768, 30306496, 4657640832, 327222722816, 131738463674880, 2341955285781504, 10584761954697844736, -1750594656814587244544, 2213182839332047713673216
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
0,2
LINKS
Table of n, a(n) for n=0..13.
CROSSREFS
Sequence in context:
A098137
A214005
A014982
*
A012754
A083568
A003121
Adjacent sequences:
A012441
A012442
A012443
*
A012445
A012446
A012447
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 April 23 05:16 EDT 2024. Contains 371906 sequences. (Running on oeis4.)