%I A146788
%S A146788 1,1,1,1,1,1,1,1,1,1,3,3,9,9,27,27,85,85,337,337,1791,1791
%N A146788 Number of n X n binary arrays symmetric about the diagonal and under 
               90 degree rotation with all ones connected only in a 0100-1100-1111 
               pattern in any orientation.
%e A146788 Maximal 11 X 11 example
%e A146788 .0.0.0.1.1.0.1.1.0.0.0
%e A146788 .0.0.1.1.1.0.1.1.1.0.0
%e A146788 .0.1.0.0.1.0.1.0.0.1.0
%e A146788 .1.1.0.0.1.0.1.0.0.1.1
%e A146788 .1.1.1.1.0.0.0.1.1.1.1
%e A146788 .0.0.0.0.0.0.0.0.0.0.0
%e A146788 .1.1.1.1.0.0.0.1.1.1.1
%e A146788 .1.1.0.0.1.0.1.0.0.1.1
%e A146788 .0.1.0.0.1.0.1.0.0.1.0
%e A146788 .0.0.1.1.1.0.1.1.1.0.0
%e A146788 .0.0.0.1.1.0.1.1.0.0.0
%Y A146788 Sequence in context: A108411 A056449 A162436 this_sequence A147244 A146575 
               A100066
%Y A146788 Adjacent sequences: A146785 A146786 A146787 this_sequence A146789 A146790 
               A146791
%K A146788 nonn
%O A146788 1,11
%A A146788 Ron Hardin (rhhardin(AT)att.net), Nov 04 2008