login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A174078 Number of circular permutations of length n with no consecutive triples i,i+2,i+4 or i,i-2,i-4. 3
20, 100, 600, 4244, 34264, 311424, 3143912, 34833964, 420917638, 5513592091, 77715460917 (list; graph; refs; listen; history; text; internal format)
OFFSET
5,1
COMMENTS
Circular permutations are permutations whose indices are from the ring of integers modulo n.
LINKS
EXAMPLE
For n=5 there are (5-1)!-a(5)=4 circular permutations with i,i+2,i+4 or i,i-2,i-4 triples. They are (0,2,4,1,3), (0,2,4,3,1), (0,1,3,4,2), and (0,3,1,4,2).
CROSSREFS
Sequence in context: A188050 A027986 A240437 * A239857 A041772 A043462
KEYWORD
nonn
AUTHOR
Isaac Lambert, Mar 10 2010
EXTENSIONS
a(10)-a(15) from Donovan Johnson, Sep 24 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 1 19:16 EST 2024. Contains 370443 sequences. (Running on oeis4.)