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!)
A146734 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1110-0111-0100 pattern in any orientation. 0

%I

%S 1,1,1,1,1,1,1,3,9,19,33,65,207,775,3377,13307,53409,249201,1453605,

%T 9533963,70032903,523853865,4420682653

%N Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1110-0111-0100 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.1.1.1.0.0

%e .0.0.1.1.1.0.0.0

%e .0.1.0.0.1.0.0.1

%e .1.1.0.0.0.1.1.1

%e .1.1.1.0.0.0.1.1

%e .1.0.0.1.0.0.1.0

%e .0.0.0.1.1.1.0.0

%e .0.0.1.1.1.0.0.0

%K nonn

%O 1,8

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 27 22:13 EST 2022. Contains 350654 sequences. (Running on oeis4.)