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!)
A146476 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1110-0111 pattern in any orientation. 0
1, 1, 1, 5, 9, 21, 67, 487, 1541, 16797, 92947, 1357947, 11628507, 269865307, 3412847085, 120253566545 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
EXAMPLE
Maximal 8 X 8 example
.1.1.1.0.1.1.1.0
.0.1.1.1.0.1.1.1
.0.0.0.0.0.0.0.0
.0.1.1.1.0.1.1.1
.1.1.1.0.1.1.1.0
.0.0.0.0.0.0.0.0
.1.1.1.0.1.1.1.0
.0.1.1.1.0.1.1.1
CROSSREFS
Sequence in context: A050559 A082676 A146932 * A110200 A063404 A102177
KEYWORD
nonn
AUTHOR
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 July 23 21:46 EDT 2024. Contains 374575 sequences. (Running on oeis4.)