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A146391 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1100-0111 pattern in any orientation. 0

%I #4 Mar 31 2012 12:35:10

%S 1,1,1,1,1,1,1,1,17,17,85,85,693,693,9501,9501,265597,265597,10400895,

%T 10400895,596407005,596407005

%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1100-0111 pattern in any orientation.

%e Maximal 9 X 9 example

%e .0.1.1.0.0.0.1.1.0

%e .1.1.0.0.0.0.0.1.1

%e .1.0.0.0.0.0.0.0.1

%e .1.0.0.0.0.0.0.0.1

%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 .1.1.0.0.0.0.0.1.1

%e .0.1.1.0.0.0.1.1.0

%K nonn

%O 1,9

%A _R. H. Hardin_

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)