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A147092 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1000-1000-1111 pattern in any orientation. 0

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

%S 1,1,1,1,1,1,1,1,59,101,919,1809,23303,53143,671599,1750531,39110451,

%T 115146065,6975569265,24305619481,1970620781315,8024744347051,

%U 1076617600931991,5122974578707761

%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1000-1000-1111 pattern in any orientation.

%e Maximal 9 X 9 example

%e .1.1.1.1.0.1.1.1.1

%e .0.0.0.1.0.1.0.0.0

%e .0.0.0.1.0.1.0.0.0

%e .0.0.0.1.0.1.0.0.0

%e .0.0.0.0.0.0.0.0.0

%e .1.0.0.0.0.0.0.0.1

%e .1.0.0.0.0.0.0.0.1

%e .1.0.0.0.0.0.0.0.1

%e .1.1.1.1.0.1.1.1.1

%K nonn

%O 1,9

%A _R. H. Hardin_, Nov 04 2008

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Last modified April 25 05:18 EDT 2024. Contains 371964 sequences. (Running on oeis4.)