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!)
A146426 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1010-1111 pattern in any orientation. 0

%I

%S 1,1,1,1,1,1,1,1,1,1,3,3,13,13,35,35,165,165,727,727,4597,4597,49361,

%T 49361

%N Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1010-1111 pattern in any orientation.

%e Maximal 11 X 11 example

%e .0.0.0.1.1.0.1.1.0.0.0

%e .0.0.0.0.1.0.1.0.0.0.0

%e .0.0.0.1.1.0.1.1.0.0.0

%e .1.0.1.0.1.0.1.0.1.0.1

%e .1.1.1.1.0.0.0.1.1.1.1

%e .0.0.0.0.0.0.0.0.0.0.0

%e .1.1.1.1.0.0.0.1.1.1.1

%e .1.0.1.0.1.0.1.0.1.0.1

%e .0.0.0.1.1.0.1.1.0.0.0

%e .0.0.0.0.1.0.1.0.0.0.0

%e .0.0.0.1.1.0.1.1.0.0.0

%K nonn

%O 1,11

%A _R. H. Hardin_

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 January 19 17:26 EST 2022. Contains 350466 sequences. (Running on oeis4.)