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A146905 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0010-1110-0111-0100 pattern in any orientation. 0

%I

%S 1,1,1,1,1,1,1,1,1,3,5,9,13,21,41,107,243,717,1683,4947,13775,49539,

%T 165935,690319,2538097,11779735,49469745,268313075,1318481817,

%U 8182984957

%N Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 0010-1110-0111-0100 pattern in any orientation.

%e Maximal 10 X 10 example

%e .0.0.0.0.0.1.0.0.0.0

%e .0.0.0.1.1.1.0.0.0.0

%e .0.0.0.0.1.1.1.0.0.0

%e .0.1.0.0.1.0.0.1.0.0

%e .0.1.1.1.0.0.0.1.1.1

%e .1.1.1.0.0.0.1.1.1.0

%e .0.0.1.0.0.1.0.0.1.0

%e .0.0.0.1.1.1.0.0.0.0

%e .0.0.0.0.1.1.1.0.0.0

%e .0.0.0.0.1.0.0.0.0.0

%K nonn

%O 1,10

%A _R. H. Hardin_, Nov 04 2008

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Last modified October 23 10:41 EDT 2014. Contains 248461 sequences.