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!)
A147335 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 01000-11100-00111-00010 pattern in any orientation. 0

%I #4 Mar 31 2012 12:35:16

%S 1,1,1,1,1,1,1,1,1,3,7,13,21,43,105,255,713,2327,7879,28233,105483,

%T 441751,1976665,9809483,52365589,307831711

%N Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 01000-11100-00111-00010 pattern in any orientation.

%e Maximal 10 X 10 example

%e .0.0.0.0.0.0.1.0.0.0

%e .0.0.0.0.0.1.1.1.0.0

%e .0.0.0.1.1.1.0.0.1.0

%e .0.0.1.0.1.0.0.0.1.1

%e .0.0.1.1.0.0.0.1.1.0

%e .0.1.1.0.0.0.1.1.0.0

%e .1.1.0.0.0.1.0.1.0.0

%e .0.1.0.0.1.1.1.0.0.0

%e .0.0.1.1.1.0.0.0.0.0

%e .0.0.0.1.0.0.0.0.0.0

%K nonn

%O 1,10

%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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 29 02:41 EDT 2024. Contains 375510 sequences. (Running on oeis4.)