Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
%I #4 Mar 31 2012 12:35:16
%S 1,1,1,1,5,21,61,299,1693,11273,84165,889613,11762051,208288599,
%T 4127254537,109970171123
%N Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-0111-0011 pattern in any orientation.
%e Maximal 8 X 8 example
%e .0.0.0.0.0.1.1.0
%e .0.0.0.1.1.1.0.1
%e .0.0.0.1.1.0.1.1
%e .0.1.1.0.0.1.1.0
%e .0.1.1.0.0.1.1.0
%e .1.1.0.1.1.0.0.0
%e .1.0.1.1.1.0.0.0
%e .0.1.1.0.0.0.0.0
%K nonn
%O 1,5
%A _R. H. Hardin_, Nov 04 2008