login
The OEIS is supported by
the many generous donors to the OEIS Foundation
.
Hints
(Greetings from
The On-Line Encyclopedia of Integer Sequences
!)
A151591
Number of permutations of 3 indistinguishable copies of 1..n arranged in a circle with exactly 3 adjacent element pairs in decreasing order.
0
0, 2, 732, 22360, 386375, 5339202, 66391738, 781132256
(
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:
A332172
A072384
A109949
*
A252986
A247080
A145124
Adjacent sequences:
A151588
A151589
A151590
*
A151592
A151593
A151594
KEYWORD
nonn
AUTHOR
R. H. Hardin
May 21 2009
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 22 12:59 EDT 2024. Contains 375369 sequences. (Running on oeis4.)