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A147272 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1000-1111-0001 pattern in any orientation. 0

%I

%S 1,1,1,1,1,1,1,1,1,5,13,25,49,141,407,1043,2925,11783,52869,254667,

%T 1211663

%N Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1000-1111-0001 pattern in any orientation.

%e Maximal 10 X 10 example

%e .0.0.0.0.0.0.0.1.0.0

%e .0.0.0.0.1.1.1.1.0.0

%e .0.0.0.0.1.0.0.0.1.1

%e .0.0.0.0.1.0.0.0.1.0

%e .0.1.1.1.0.0.0.0.1.0

%e .0.1.0.0.0.0.1.1.1.0

%e .0.1.0.0.0.1.0.0.0.0

%e .1.1.0.0.0.1.0.0.0.0

%e .0.0.1.1.1.1.0.0.0.0

%e .0.0.1.0.0.0.0.0.0.0

%K nonn

%O 1,10

%A _R. H. Hardin_, Nov 04 2008

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Last modified January 23 13:40 EST 2020. Contains 331171 sequences. (Running on oeis4.)