The On-Line Encyclopedia of Integer Sequences (OEIS)

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A147320

Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 00100-00100-00100-11111 pattern in any orientation.
(history; published version)

#4 by Russ Cox at Sat Mar 31 12:35:16 EDT 2012

AUTHOR

_R. H. Hardin (rhhardin(AT)att.net)_

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)

#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 horizontal and vertical reflection with all ones connected only in a 00100-00100-00100-11111 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 horizontal and vertical reflection with all ones connected only in a 00100-00100-00100-11111 pattern in any orentation.

DATA

1, 1, 1, 1, 1, 1, 1, 1, 6, 1, 33, 9, 187, 25, 1110

OFFSET

1,9

EXAMPLE

Maximal 9 X 9 example

.0.0.1.1.1.1.1.0.0

.0.0.0.0.1.0.0.0.0

.1.0.0.0.1.0.0.0.1

.1.1.1.1.0.1.1.1.1

.1.0.0.0.1.0.0.0.1

.0.0.0.0.1.0.0.0.0

.0.0.1.1.1.1.1.0.0

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net)

STATUS

approved