Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A059525
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A059525 Number of n X n checkerboards in which the set of red squares is edge connected. +0
1
0, 1, 13, 218, 11506, 2301877, 1732082741, 4872949974666 (list; graph; listen)
OFFSET

0,3

COMMENT

Number of nonzero nXn binary arrays with all 1's connected, would be clearer. [From Ron Hardin (rhhardin(AT)att.net), Jul 06 2009]

CROSSREFS

Cf. A059020, A059021.

Sequence in context: A069989 A140517 A096141 this_sequence A086147 A015253 A051621

Adjacent sequences: A059522 A059523 A059524 this_sequence A059526 A059527 A059528

KEYWORD

nonn

AUTHOR

David Radcliffe (radcl008(AT)umn.edu), Jan 21 2001

EXTENSIONS

One more term from John W. Layman (layman(AT)vt.edu), Jan 25 2001

More terms from Ron Hardin (rhhardin(AT)att.net), Feb 28 2002

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 December 9 18:50 EST 2009. Contains 170568 sequences.


AT&T Labs Research