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!)
A147259 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0001-1101-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 5, 13, 43, 61, 149, 365, 1499 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

Table of n, a(n) for n=1..13.

EXAMPLE

Maximal 8 X 8 example

.1.0.0.0.0.1.1.1

.1.0.1.1.0.1.0.0

.1.1.1.0.0.1.1.0

.0.0.0.0.0.0.1.0

.0.1.0.0.0.0.0.0

.0.1.1.0.0.1.1.1

.0.0.1.0.1.1.0.1

.1.1.1.0.0.0.0.1

CROSSREFS

Sequence in context: A298234 A129789 A093576 * A328740 A183315 A183184

Adjacent sequences:  A147256 A147257 A147258 * A147260 A147261 A147262

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 June 29 23:00 EDT 2022. Contains 354913 sequences. (Running on oeis4.)