login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A177598
Number of permutations of 3 copies of 1..n avoiding adjacent step pattern up, down, up.
0
1, 15, 767, 93621, 22431655, 9362799454, 6260161965339, 6298506200484865, 9087853319185940117, 18101094912700638755191
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..10.
CROSSREFS
Sequence in context:
A199227
A055683
A196465
*
A333562
A116094
A267754
Adjacent sequences:
A177595
A177596
A177597
*
A177599
A177600
A177601
KEYWORD
nonn
AUTHOR
R. H. Hardin
, May 10 2010
EXTENSIONS
a(9)-a(10) from
Alois P. Heinz
, Nov 02 2013
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 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)