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A147069 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 10000-11111-00001 pattern in any orientation. 0

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

%S 1,1,1,1,1,1,1,1,1,1,13,13,65,65,297,297,2247,2247,24427,24427,296303,

%T 296303,6915839,6915839,203810183,203810183

%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 10000-11111-00001 pattern in any orientation.

%e Maximal 11 X 11 example

%e .1.1.0.0.0.0.0.0.0.1.1

%e .0.1.0.0.0.0.0.0.0.1.0

%e .0.1.0.0.0.0.0.0.0.1.0

%e .0.1.0.0.0.0.0.0.0.1.0

%e .0.1.1.0.0.0.0.0.1.1.0

%e .0.0.0.0.0.0.0.0.0.0.0

%e .0.1.1.0.0.0.0.0.1.1.0

%e .0.1.0.0.0.0.0.0.0.1.0

%e .0.1.0.0.0.0.0.0.0.1.0

%e .0.1.0.0.0.0.0.0.0.1.0

%e .1.1.0.0.0.0.0.0.0.1.1

%K nonn

%O 1,11

%A _R. H. Hardin_, Nov 04 2008

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Last modified April 24 05:26 EDT 2024. Contains 371918 sequences. (Running on oeis4.)