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!)
A147020 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 01000-11111-01000 pattern in any orientation. 0

%I #4 Mar 31 2012 12:35:14

%S 1,1,1,1,3,1,15,9,133,33,3625,1063,187163,37071,15421524,1848587,

%T 2304715815,239808955,763574051396,59268926793,494418074953389,

%U 27771432799839

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 01000-11111-01000 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.0.0.0.0

%e .0.0.0.0.0.0.0.0

%e .0.0.0.0.0.0.0.0

%e .0.1.0.0.0.0.1.0

%e .0.1.0.0.0.0.1.0

%e .0.1.0.0.0.0.1.0

%e .1.1.1.0.0.1.1.1

%e .0.1.0.0.0.0.1.0

%K nonn

%O 1,5

%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 25 10:43 EDT 2024. Contains 371967 sequences. (Running on oeis4.)