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A147095 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1000-1000-1111 pattern in any orientation. 0

%I #4 Mar 31 2012 12:35:15

%S 1,1,1,1,3,3,5,7,23,43,97,209,521,1391,4635,14277,54221,189323,860301,

%T 3540691,18022413,86154579,507402119,2814410215,19349048791,

%U 125262392501

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

%e Maximal 8 X 8 example

%e .0.0.0.0.0.0.0.0

%e .0.0.0.1.1.1.1.0

%e .0.0.0.0.0.0.1.0

%e .0.1.0.0.0.0.1.0

%e .0.1.0.0.0.0.1.0

%e .0.1.0.0.0.0.0.0

%e .0.1.1.1.1.0.0.0

%e .0.0.0.0.0.0.0.0

%K nonn

%O 1,5

%A _R. H. Hardin_, Nov 04 2008

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Last modified April 25 11:39 EDT 2024. Contains 371969 sequences. (Running on oeis4.)