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A147453 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11000-01111-11000 pattern in any orientation. 0

%I #4 Mar 31 2012 12:35:17

%S 1,1,1,1,3,1,15,9,105,33,2514,927,80722,22331,4773446,785549,

%T 420563686,56689127,72421134415,8452376637,24510814953678,

%U 2212845668155

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11000-01111-11000 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.0.0.0.0

%e .0.0.0.0.0.0.0.0

%e .0.0.0.0.0.0.0.0

%e .1.0.1.0.0.1.0.1

%e .1.1.1.0.0.1.1.1

%e .0.1.0.0.0.0.1.0

%e .0.1.0.0.0.0.1.0

%e .0.1.0.0.0.0.1.0

%K nonn

%O 1,5

%A _R. H. Hardin_

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Last modified April 23 14:15 EDT 2024. Contains 371914 sequences. (Running on oeis4.)