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!)
A146372 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-1111-0010 pattern in any orientation. 0

%I #4 Mar 31 2012 12:35:10

%S 1,1,1,1,1,13,27,135,531,2573,17743,176473,1599401,23234641,323134671,

%T 6982586189,150620917453,4817580729223,154870862911911

%N Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-1111-0010 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.0.1.0.0

%e .0.0.0.0.1.1.1.1

%e .0.1.0.0.0.0.1.0

%e .1.1.1.1.0.1.0.0

%e .0.0.1.0.1.1.1.1

%e .0.1.0.0.0.0.1.0

%e .1.1.1.1.0.0.0.0

%e .0.0.1.0.0.0.0.0

%K nonn

%O 1,6

%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 April 13 05:19 EDT 2024. Contains 371639 sequences. (Running on oeis4.)