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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A151629 Number of permutations of 2 indistinguishable copies of 1..n with exactly 7 adjacent element pairs in decreasing order. 0
0, 232, 450048, 163809288, 27306899520, 2898916824320, 230479103253264 (list; graph; refs; listen; history; internal format)
OFFSET

4,2

CROSSREFS

Sequence in context: A206573 A125850 A139673 * A132917 A139652 A126979

Adjacent sequences:  A151626 A151627 A151628 * A151630 A151631 A151632

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) May 29 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 14 08:32 EST 2012. Contains 205614 sequences.