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A147169 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1101-0111 pattern in any orientation. 0

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

%S 1,1,1,1,9,21,55,201,1193,6291,45811,376085,4555905

%N Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1101-0111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.1.1.0.0.1.1.0

%e .0.1.0.0.0.0.1.1

%e .0.1.1.0.0.0.0.1

%e .0.0.1.1.0.0.1.1

%e .1.1.0.0.1.1.0.0

%e .1.0.0.0.0.1.1.0

%e .1.1.0.0.0.0.1.0

%e .0.1.1.0.0.1.1.0

%K nonn

%O 1,5

%A _R. H. Hardin_, Nov 04 2008

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Last modified April 22 05:00 EDT 2024. Contains 371887 sequences. (Running on oeis4.)