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A147030 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0100-0100-1111-0010 pattern in any orientation. 0

%I #4 Mar 31 2012 12:35:14

%S 1,1,1,1,1,3,13,31,77,387,2257,17627,156913,1449769,17078273,

%T 269362403,5270658519,128747962057,3752690933565,128409913359645,

%U 5451255918471683

%N Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0100-0100-1111-0010 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 .0.0.0.0.0.0.1.0

%e .0.0.0.0.1.1.1.0

%e .0.0.0.1.0.0.1.1

%e .0.0.0.1.0.0.1.0

%e .0.0.1.1.1.1.0.0

%e .0.0.0.0.1.0.0.0

%K nonn

%O 1,6

%A _R. H. Hardin_, Nov 04 2008

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Last modified May 27 15:48 EDT 2024. Contains 372878 sequences. (Running on oeis4.)