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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A151588 Number of permutations of 2 indistinguishable copies of 1..n arranged in a circle with exactly 7 adjacent element pairs in decreasing order. 0
0, 760, 911520, 222334560, 25996425216, 1996732745784, 117482611237280 (list; graph; refs; listen; history; internal format)
OFFSET

4,2

CROSSREFS

Sequence in context: A151633 A022051 A107515 * A141144 A139664 A160033

Adjacent sequences:  A151585 A151586 A151587 * A151589 A151590 A151591

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) May 21 2009

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

Content is available under The OEIS End-User License Agreement .

Last modified February 17 06:10 EST 2012. Contains 205988 sequences.