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%I #3 Mar 31 2012 12:35:09
%S 1,1,1,1,1,1,49,91,755,1733,17237,43939,2178205,7075949,921596877,
%T 3869156215,535678119399,2790029976011,707504525942961,
%U 4543722915142743,2950922408069540377,23782316720866894839,30573780517964151258947
%N Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 5-point zee 1,1 2,1 2,2 2,3 3,3 in any orientation.
%e Maximal 8 X 8 example
%e .0.0.0.0.0.0.0.0
%e .1.0.0.0.0.0.0.1
%e .1.1.1.0.0.1.1.1
%e .0.0.1.0.0.1.0.0
%e .0.0.0.0.0.0.0.0
%e .1.0.0.0.0.0.0.1
%e .1.1.1.0.0.1.1.1
%e .0.0.1.0.0.1.0.0
%K nonn
%O 1,7
%A _R. H. Hardin_, Oct 26 2008