Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A007767
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A007767 Number of pairs of permutations of degree n that avoid (12,21). +0
1
1, 3, 17, 151, 1899, 31711, 672697 (list; graph; listen)
OFFSET

1,2
CROSSREFS

Sequence in context: A080253 A009813 A135750 this_sequence A075820 A145081 A020562

Adjacent sequences: A007764 A007765 A007766 this_sequence A007768 A007769 A007770

KEYWORD

nonn

AUTHOR

Steve Linton [ sal(AT)cs.st-andrews.ac.uk ]

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified November 24 23:16 EST 2009. Contains 167481 sequences.

AT&T Labs Research

Legal Notice
© 2009 AT&T Intellectual Property. All Rights Reserved.