login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A107763 Number of ways to arrange the numbers (1,3,5,7,9,...,2n-1) in a circle such that every two adjacent numbers are relatively prime. 2
1, 1, 2, 6, 12, 72, 480, 864, 9600, 108000, 312000, 4795200, 46293120, 241056000, 4759413120, 94182359040, 478511953920, 4873965022080, 122634632171520, 799554193966080, 23063946114908160, 664424069072117760, 3198456730188840960, 108184656752428032000, 2657146152621477888000, 22850984107452933734400, 863305241854715928576000, 15282315334192501724774400, 151673086024479840160972800 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Odd analog of A086595.

LINKS

Table of n, a(n) for n=1..29.

CROSSREFS

Cf. A076220, A086595, A102381, A107761, A107762.

Sequence in context: A258213 A178846 A173843 * A166470 A144144 A226178

Adjacent sequences:  A107760 A107761 A107762 * A107764 A107765 A107766

KEYWORD

nonn

AUTHOR

Ray Chandler, Jun 11 2005

EXTENSIONS

More terms from Max Alekseyev, Jun 11 2005

a(23)-a(29) from Max Alekseyev, Jul 08 2014

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified September 26 10:59 EDT 2017. Contains 292518 sequences.