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!)
A147073 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 10000-11111-00001 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 3, 11, 21, 39, 89, 219, 569, 1579, 5069, 17101, 62347, 244493, 1058973, 4994427, 25066841, 137507293, 817420471 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

LINKS

Table of n, a(n) for n=1..24.

EXAMPLE

Maximal 8 X 8 example

.1.1.0.0.0.0.0.1

.0.1.0.1.1.1.1.1

.0.1.0.1.0.0.0.0

.0.1.0.0.0.1.1.0

.0.1.1.0.0.0.1.0

.0.0.0.0.1.0.1.0

.1.1.1.1.1.0.1.0

.1.0.0.0.0.0.1.1

CROSSREFS

Sequence in context: A322595 A317298 A064568 * A147191 A327607 A034185

Adjacent sequences:  A147070 A147071 A147072 * A147074 A147075 A147076

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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 29 22:33 EDT 2022. Contains 357092 sequences. (Running on oeis4.)