Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A051758
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A051758 Consider problem of placing A051755(n) queens on an n X n board so that each queen attacks precisely 2 others. Sequence gives number of solutions up to square symmetry. +0
2
1, 4, 2, 1, 1, 5, 2 (list; graph; listen)
OFFSET

2,2
CROSSREFS

Cf. A051754-A051759, A051567-A051571, A019654.

Sequence in context: A097526 A051149 A152145 this_sequence A024553 A051568 A016509

Adjacent sequences: A051755 A051756 A051757 this_sequence A051759 A051760 A051761

KEYWORD

nonn,nice,more

AUTHOR

Robert Trent (trentrd(AT)hotmail.com), Aug 23 2000

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 25 20:05 EST 2009. Contains 167514 sequences.

AT&T Labs Research

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