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!)
A146914 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0100-1110-0111-0010 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 5, 5, 9, 9, 19, 19, 57, 57, 217, 217, 857, 857, 3619, 3619, 18707, 18707, 117969, 117969, 876253, 876253 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,9
LINKS
EXAMPLE
Maximal 9 X 9 example
.0.0.1.0.0.0.1.0.0
.0.1.1.1.0.1.1.1.0
.1.1.1.0.0.0.1.1.1
.0.1.0.0.0.0.0.1.0
.0.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.0.1.0
.1.1.1.0.0.0.1.1.1
.0.1.1.1.0.1.1.1.0
.0.0.1.0.0.0.1.0.0
CROSSREFS
Sequence in context: A151970 A049644 A147472 * A146253 A147040 A146277
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 21 21:50 EDT 2024. Contains 373559 sequences. (Running on oeis4.)