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%I #4 Mar 31 2012 12:35:17
%S 1,1,1,1,1,1,1,1,3,7,13,21,39,91,251,693,2197,6837,23871,89603,379705,
%T 1672695,8302957,42265243,244734851,1469763313
%N Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1010-1111-0101 pattern in any orientation.
%e Maximal 9 X 9 example
%e .0.0.0.0.1.0.1.0.0
%e .0.0.0.1.1.1.1.0.0
%e .0.0.0.1.0.1.0.1.1
%e .0.1.1.0.0.0.1.1.0
%e .1.1.0.0.0.0.0.1.1
%e .0.1.1.0.0.0.1.1.0
%e .1.1.0.1.0.1.0.0.0
%e .0.0.1.1.1.1.0.0.0
%e .0.0.1.0.1.0.0.0.0
%K nonn
%O 1,9
%A _R. H. Hardin_