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!)
A146472 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1110-0111 pattern in any orientation. 0

%I

%S 1,1,1,1,3,9,23,85,375,2149,15299,129877,1353943,17475557,279267939,

%T 5511590965,133957241929,4003924495735,147542199515841,

%U 6704016396279819,375798793326385295,25965634034447375655

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

%e Maximal 8 X 8 example

%e .0.1.1.1.0.0.0.0

%e .1.0.1.1.1.0.0.0

%e .1.1.0.0.0.0.0.0

%e .1.1.0.0.0.0.1.0

%e .0.1.0.0.0.0.1.1

%e .0.0.0.0.0.0.1.1

%e .0.0.0.1.1.1.0.1

%e .0.0.0.0.1.1.1.0

%K nonn

%O 1,5

%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 27 23:41 EST 2022. Contains 350654 sequences. (Running on oeis4.)