login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A146804 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0110-1100-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 7, 7, 21, 21, 47, 47, 187, 187, 1039, 1039 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,13

LINKS

Table of n, a(n) for n=1..22.

EXAMPLE

Maximal 13 X 13 example

.0.0.1.1.1.0.0.0.1.1.1.0.0

.0.0.0.0.1.1.0.1.1.0.0.0.0

.1.0.0.1.1.0.0.0.1.1.0.0.1

.1.0.1.0.0.0.0.0.0.0.1.0.1

.1.1.1.0.0.0.0.0.0.0.1.1.1

.0.1.0.0.0.0.0.0.0.0.0.1.0

.0.0.0.0.0.0.0.0.0.0.0.0.0

.0.1.0.0.0.0.0.0.0.0.0.1.0

.1.1.1.0.0.0.0.0.0.0.1.1.1

.1.0.1.0.0.0.0.0.0.0.1.0.1

.1.0.0.1.1.0.0.0.1.1.0.0.1

.0.0.0.0.1.1.0.1.1.0.0.0.0

.0.0.1.1.1.0.0.0.1.1.1.0.0

CROSSREFS

Sequence in context: A341833 A253071 A283916 * A147056 A146631 A146671

Adjacent sequences:  A146801 A146802 A146803 * A146805 A146806 A146807

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 22 02:46 EST 2022. Contains 350481 sequences. (Running on oeis4.)