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A146063 Number of n X n binary arrays with all ones connected only in a 5-point zee 1,1 2,1 2,2 2,3 3,3 in any orientation. 0

%I #3 Mar 31 2012 12:35:09

%S 1,1,5,17,53,497,10289,196357,5677027,310742317,27512226687,

%T 3369038880519,646981592661815,203366474520147193

%N Number of n X n binary arrays with all ones connected only in a 5-point zee 1,1 2,1 2,2 2,3 3,3 in any orientation.

%e Maximal 8 X 8 example

%e .0.0.1.0.0.0.1.0

%e .1.1.1.0.1.1.1.0

%e .1.0.0.0.1.0.0.1

%e .0.0.0.0.0.1.1.1

%e .0.1.1.0.0.1.0.0

%e .0.1.0.1.1.0.0.1

%e .1.1.0.1.0.1.1.1

%e .0.0.1.1.0.1.0.0

%K nonn

%O 1,3

%A _R. H. Hardin_, Oct 26 2008

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Last modified April 24 04:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)