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A146134 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 3X2 zee 1,1 1,2 1,3 2,3 2,4 in any orientation. 0

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

%S 1,1,1,5,17,39,241,1589,13237,156057,2242755,43222843,1066074605

%N Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 3X2 zee 1,1 1,2 1,3 2,3 2,4 in any orientation.

%e Maximal 8 X 8 example

%e .0.1.0.0.1.1.1.0

%e .1.1.0.0.0.0.1.1

%e .1.0.0.1.1.0.0.0

%e .1.0.0.0.1.1.1.0

%e .0.1.1.1.0.0.0.1

%e .0.0.0.1.1.0.0.1

%e .1.1.0.0.0.0.1.1

%e .0.1.1.1.0.0.1.0

%K nonn

%O 1,4

%A _R. H. Hardin_, Oct 27 2008

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Last modified April 23 20:33 EDT 2024. Contains 371916 sequences. (Running on oeis4.)