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A146006 Number of n X n binary arrays with all ones connected only in a 3X3 tee 1,1 1,2 1,3 2,2 3,2 in any orientation. 0

%I #3 Mar 31 2012 12:35:08

%S 1,1,5,17,53,559,10558,208889,6272332,353563401,30617473617,

%T 3806002157431,753576262868027

%N Number of n X n binary arrays with all ones connected only in a 3X3 tee 1,1 1,2 1,3 2,2 3,2 in any orientation.

%e Maximal 8 X 8 example

%e .1.0.0.1.1.1.0.0

%e .1.1.1.0.1.0.0.0

%e .1.0.0.0.1.0.0.1

%e .0.0.0.0.0.1.1.1

%e .0.0.1.1.1.0.0.1

%e .0.1.0.1.0.1.0.0

%e .0.1.0.1.0.1.1.1

%e .1.1.1.0.0.1.0.0

%K nonn

%O 1,3

%A _R. H. Hardin_, Oct 26 2008

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Last modified April 24 13:13 EDT 2024. Contains 371947 sequences. (Running on oeis4.)