login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A177648
Number of permutations of 4 copies of 1..n avoiding adjacent step pattern up, down, down, down, up
0
1, 70, 34650, 60778746, 277113842057, 2730472552564105, 51347486465256186884
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..7.
CROSSREFS
Sequence in context:
A266740
A177640
A177641
*
A177653
A177659
A177665
Adjacent sequences:
A177645
A177646
A177647
*
A177649
A177650
A177651
KEYWORD
nonn
AUTHOR
R. H. Hardin
May 10 2010
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 August 23 03:25 EDT 2024. Contains 375375 sequences. (Running on oeis4.)