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

%S 1,1,1,1,1,1,5,17,29,45,101,297,821,2819,10635,50419,205159,928911,

%T 4321051,24702095,144781137,1031901327,7307383577,64959695293,

%U 541722263927,5441453632793

%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 110-111-111 pattern in any orientation.

%e Maximal 8 X 8 example

%e .0.0.0.0.1.1.1.0

%e .1.1.0.0.1.1.1.0

%e .1.1.1.0.1.1.0.0

%e .1.1.1.0.0.0.0.0

%e .0.0.0.0.0.1.1.1

%e .0.0.1.1.0.1.1.1

%e .0.1.1.1.0.0.1.1

%e .0.1.1.1.0.0.0.0

%K nonn

%O 1,7

%A _R. H. Hardin_