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!)
A147266 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0100-1100-0111-0001 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 15, 15, 33, 33, 77, 77, 553, 553 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,13
LINKS
EXAMPLE
Maximal 13 X 13 example
.0.0.0.1.0.0.0.0.0.1.0.0.0
.0.0.1.1.0.0.0.0.0.1.1.0.0
.0.1.0.1.1.1.0.1.1.1.0.1.0
.1.1.1.0.0.1.0.1.0.0.1.1.1
.0.0.1.0.0.0.0.0.0.0.1.0.0
.0.0.1.1.0.0.0.0.0.1.1.0.0
.0.0.0.0.0.0.0.0.0.0.0.0.0
.0.0.1.1.0.0.0.0.0.1.1.0.0
.0.0.1.0.0.0.0.0.0.0.1.0.0
.1.1.1.0.0.1.0.1.0.0.1.1.1
.0.1.0.1.1.1.0.1.1.1.0.1.0
.0.0.1.1.0.0.0.0.0.1.1.0.0
.0.0.0.1.0.0.0.0.0.1.0.0.0
CROSSREFS
Sequence in context: A330567 A050350 A196060 * A147152 A189976 A188272
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 March 28 05:02 EDT 2024. Contains 371235 sequences. (Running on oeis4.)