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!)
A147190 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 11000-01110-00011 pattern in any orientation. 0

%I #4 Mar 31 2012 12:35:15

%S 1,1,1,1,1,1,1,1,1,1,1,1,3,3,7,7,15,15,41,41,163,163,697,697,3471,

%T 3471,20005,20005

%N Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 11000-01110-00011 pattern in any orientation.

%e Maximal 13 X 13 example

%e .0.0.0.1.0.0.0.0.0.1.0.0.0

%e .0.0.0.1.1.0.0.0.1.1.0.0.0

%e .0.0.0.0.1.0.0.0.1.0.0.0.0

%e .1.1.0.0.1.1.0.1.1.0.0.1.1

%e .0.1.1.1.0.1.0.1.0.1.1.1.0

%e .0.0.0.1.1.0.0.0.1.1.0.0.0

%e .0.0.0.0.0.0.0.0.0.0.0.0.0

%e .0.0.0.1.1.0.0.0.1.1.0.0.0

%e .0.1.1.1.0.1.0.1.0.1.1.1.0

%e .1.1.0.0.1.1.0.1.1.0.0.1.1

%e .0.0.0.0.1.0.0.0.1.0.0.0.0

%e .0.0.0.1.1.0.0.0.1.1.0.0.0

%e .0.0.0.1.0.0.0.0.0.1.0.0.0

%K nonn

%O 1,13

%A _R. H. Hardin_, Nov 04 2008

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 14:38 EDT 2024. Contains 371254 sequences. (Running on oeis4.)