%I #4 Mar 31 2012 12:35:11
%S 1,1,1,1,1,1,1,3,7,15,31,71,203,581,2061,8089,33693,163089,819567,
%T 4807311,30022515,215155907,1673895429
%N Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1000-1111 pattern in any orientation.
%e Maximal 8 X 8 example
%e .0.0.0.1.1.1.1.0
%e .0.0.0.1.0.0.0.1
%e .0.0.0.1.0.0.0.1
%e .1.1.1.0.0.0.0.1
%e .1.0.0.0.0.1.1.1
%e .1.0.0.0.1.0.0.0
%e .1.0.0.0.1.0.0.0
%e .0.1.1.1.1.0.0.0
%K nonn
%O 1,8
%A _R. H. Hardin_, Nov 04 2008