login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A177602
Number of permutations of 3 copies of 1..n avoiding adjacent step pattern up, down, up, down
0
1, 18, 1200, 196544, 64274760, 36903349792, 34074227986704, 47451264308831568
(
list
;
graph
;
refs
;
listen
;
history
;
text
;
internal format
)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..8.
CROSSREFS
Sequence in context:
A064564
A152933
A360602
*
A252969
A182286
A292609
Adjacent sequences:
A177599
A177600
A177601
*
A177603
A177604
A177605
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 March 29 05:48 EDT 2024. Contains 371265 sequences. (Running on oeis4.)