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!)
A146778 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0010-1010-1111 pattern in any orientation. 0

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

%S 1,1,1,1,1,5,17,43,145,633,4131,31831,267243,2665825,33726547,

%T 521722083,9834245987,228276099483,6476476460303,221310304612835,

%U 9127636122908961

%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0010-1010-1111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.1.1.1.1.0.0

%e .0.0.1.0.1.0.0.0

%e .1.1.0.0.1.0.0.1

%e .1.0.0.0.0.1.1.1

%e .1.1.1.0.0.0.0.1

%e .1.0.0.1.0.0.1.1

%e .0.0.0.1.0.1.0.0

%e .0.0.1.1.1.1.0.0

%K nonn

%O 1,6

%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 April 16 01:40 EDT 2024. Contains 371696 sequences. (Running on oeis4.)