|
%I #4 Mar 31 2012 12:35:11
%S 1,1,1,1,1,1,1,9,20,33,56,137,404,1209,4087,15733,60343,254309,
%T 1153606,5642466,31006709,182836767,1183007758,8378875432,64857203324
%N Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-0111-1100 pattern in any orientation.
%e Maximal 8 X 8 example
%e .0.0.0.0.1.0.1.0
%e .1.1.0.0.1.1.1.0
%e .0.1.1.1.0.1.0.0
%e .1.1.0.0.0.1.0.0
%e .0.0.1.0.0.0.1.1
%e .0.0.1.0.1.1.1.0
%e .0.1.1.1.0.0.1.1
%e .0.1.0.1.0.0.0.0
%K nonn
%O 1,8
%A _R. H. Hardin_, Nov 04 2008
|
