The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A147106

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

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1000-1100-0111 pattern in any orientation.
(history; published version)

#4 by Russ Cox at Sat Mar 31 12:35:15 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net), _, Nov 04 2008

Discussion

Sat Mar 31

12:35

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

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

KEYWORD

nonn,new

nonn

AUTHOR

Ron R. H. Hardin (rhhardin(AT)att.net), Nov 04 2008

#2 by N. J. A. Sloane at Tue Jun 01 03:00:00 EDT 2010

NAME

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1000-1100-0111 pattern in any orentationorientation.

KEYWORD

nonn,new

nonn

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

NAME

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1000-1100-0111 pattern in any orentation.

DATA

1, 1, 1, 1, 3, 7, 15, 37, 181, 733, 3563, 18321, 120179, 876663, 8507491, 85942209, 1181855975

OFFSET

1,5

EXAMPLE

Maximal 8 X 8 example

.1.0.0.0.1.1.1.0

.1.0.0.0.0.0.1.1

.1.1.0.0.0.0.0.1

.0.1.1.1.0.0.0.1

.1.0.0.0.1.1.1.0

.1.0.0.0.0.0.1.1

.1.1.0.0.0.0.0.1

.0.1.1.1.0.0.0.1

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net), Nov 04 2008

STATUS

approved