%I #3 Mar 31 2012 12:35:09
%S 1,1,1,1,1,1,17,17,57,57,781,781,24351,24351,931801,931801,62200649,
%T 62200649,8963823755,8963823755,2146203654665,2146203654665,
%U 870522837091137,870522837091137,672438522925983773
%N Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 2X2 block with tail 1,1 1,2 1,3 2,2 2,3 in any orientation.
%e Maximal 8 X 8 example
%e .0.0.0.0.0.0.0.0
%e .1.1.0.0.0.0.1.1
%e .1.1.1.0.0.1.1.1
%e .0.0.0.0.0.0.0.0
%e .0.0.0.0.0.0.0.0
%e .1.1.1.0.0.1.1.1
%e .1.1.0.0.0.0.1.1
%e .0.0.0.0.0.0.0.0
%K nonn
%O 1,7
%A _R. H. Hardin_, Oct 26 2008