|
%I #4 Mar 31 2012 12:35:10
%S 1,1,1,1,1,6,1,20,13,138,69,1792,528,26977,7033,655185,141904,
%T 24548006,4322355,1409242126,197401178,123270232283,13868215311,
%U 16071746508178,1479290583806,3212023185510693
%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-1111 pattern in any orientation.
%e Maximal 8 X 8 example
%e .0.0.0.0.0.0.0.0
%e .0.0.0.1.1.0.0.0
%e .1.0.1.1.1.1.0.1
%e .1.1.0.0.0.0.1.1
%e .1.1.0.0.0.0.1.1
%e .1.0.1.1.1.1.0.1
%e .0.0.0.1.1.0.0.0
%e .0.0.0.0.0.0.0.0
%K nonn
%O 1,6
%A _R. H. Hardin_
|
