%I A147145
%S A147145 1,1,1,1,1,1,1,1,13,25,51,161,489,1381,4593,16307,70385
%N A147145 Number of n X n binary arrays symmetric under 90 degree rotation with 
               all ones connected only in a 1000-1100-0110-0011 pattern in any orientation.
%e A147145 Maximal 9 X 9 example
%e A147145 .1.0.0.0.0.0.0.1.1
%e A147145 .1.1.0.0.0.0.1.1.0
%e A147145 .0.1.1.0.0.1.1.0.0
%e A147145 .0.0.1.1.0.1.0.0.0
%e A147145 .0.0.0.0.0.0.0.0.0
%e A147145 .0.0.0.1.0.1.1.0.0
%e A147145 .0.0.1.1.0.0.1.1.0
%e A147145 .0.1.1.0.0.0.0.1.1
%e A147145 .1.1.0.0.0.0.0.0.1
%Y A147145 Sequence in context: A125724 A163551 A005696 this_sequence A151776 A116524 
               A053404
%Y A147145 Adjacent sequences: A147142 A147143 A147144 this_sequence A147146 A147147 
               A147148
%K A147145 nonn
%O A147145 1,9
%A A147145 Ron Hardin (rhhardin(AT)att.net), Nov 04 2008