login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A146391 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1100-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 85, 85, 693, 693, 9501, 9501, 265597, 265597, 10400895, 10400895, 596407005, 596407005 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,9

LINKS

Table of n, a(n) for n=1..22.

EXAMPLE

Maximal 9 X 9 example

.0.1.1.0.0.0.1.1.0

.1.1.0.0.0.0.0.1.1

.1.0.0.0.0.0.0.0.1

.1.0.0.0.0.0.0.0.1

.0.0.0.0.0.0.0.0.0

.1.0.0.0.0.0.0.0.1

.1.0.0.0.0.0.0.0.1

.1.1.0.0.0.0.0.1.1

.0.1.1.0.0.0.1.1.0

CROSSREFS

Sequence in context: A146660 A070852 A146596 * A145945 A165838 A217543

Adjacent sequences:  A146388 A146389 A146390 * A146392 A146393 A146394

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 19 12:35 EDT 2019. Contains 325159 sequences. (Running on oeis4.)