The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A139009 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing all changes.

A139009

Number of n X n symmetric binary matrices containing no more than one 1 in any 3 X 3 sub-block.
(history; published version)

#8 by Jon E. Schoenfield at Mon Mar 09 04:28:40 EDT 2015

STATUS

editing

approved

#7 by Jon E. Schoenfield at Mon Mar 09 04:28:38 EDT 2015

LINKS

_R. H. Hardin_, , May 31 2008, <a href="/A139009/b139009.txt">Table of n, a(n) for n = 0..28</a>

STATUS

approved

editing

#6 by Russ Cox at Sat Mar 31 12:35:07 EDT 2012

LINKS

_R. H. Hardin (rhhardin(AT)att.net), _, May 31 2008, <a href="/A139009/b139009.txt">Table of n, a(n) for n = 0..28</a>

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net), _, May 31 2008

Discussion

Sat Mar 31

12:35

OEIS Server: https://oeis.org/edit/global/875

#5 by N. J. A. Sloane at Thu Nov 11 07:34:06 EST 2010

LINKS

R. H. Hardin (rhhardin(AT)att.net), May 31 2008, <a href="/A139009/b139009.txt">Table of n, a(n) for n = 0..28</a>

KEYWORD

nonn,new

nonn

#4 by N. J. A. Sloane at Sat Oct 02 03:00:00 EDT 2010

LINKS

Ron R. H. Hardin (rhhardin(AT)att.net), May 31 2008, <a href="b139009.txt">Table of n, a(n) for n = 0..28</a>

KEYWORD

nonn,new

nonn

AUTHOR

Ron R. H. Hardin (rhhardin(AT)att.net), May 31 2008

#3 by N. J. A. Sloane at Fri Feb 27 03:00:00 EST 2009

LINKS

Ron Hardin (rhhardin(AT)att.net), May 31 2008, <a href="http://www.research.att.com/~njas/sequences/b139009.txt">Table of n, a(n) for n = 0..28</a>

KEYWORD

nonn,new

nonn

#2 by N. J. A. Sloane at Fri Jan 09 03:00:00 EST 2009

LINKS

Ron Hardin (rhhrhhardin(AT)cadenceatt.comnet), May 31 2008, <a href="http://www.research.att.com/~njas/sequences/b139009.txt">Table of n, a(n) for n = 0..28</a>

KEYWORD

nonn,new

nonn

AUTHOR

Ron Hardin (rhhrhhardin(AT)cadenceatt.comnet), May 31 2008

#1 by N. J. A. Sloane at Sun Jun 29 03:00:00 EDT 2008

NAME

Number of n X n symmetric binary matrices containing no more than one 1 in any 3 X 3 sub-block.

DATA

1, 2, 3, 4, 10, 29, 73, 255, 1166, 5371, 29682, 210876, 1671283, 15280803, 171861787, 2259744342, 34374508575, 625277335018, 13461221324518, 338565697760175, 10066909617112085, 354314901636357736, 14658961195961880848

OFFSET

0,2

LINKS

Ron Hardin (rhh(AT)cadence.com), May 31 2008, <a href="http://www.research.att.com/~njas/sequences/b139009.txt">Table of n, a(n) for n = 0..28</a>

KEYWORD

nonn,new

AUTHOR

Ron Hardin (rhh(AT)cadence.com), May 31 2008

STATUS

approved