%I A146624
%S A146624 1,1,1,1,1,1,7,15,27,59,155,405,1359,4729,17093,68787,322325,1555247,
%T A146624 8826433,52320689,346500913,2442891583,19699289407,167408986709,
%U A146624 1625563585505
%N A146624 Number of n X n binary arrays symmetric under 90 degree rotation with 
               all ones connected only in a 1001-1111 pattern in any orientation.
%e A146624 Maximal 8 X 8 example
%e A146624 .0.0.0.0.0.1.1.0
%e A146624 .1.0.0.1.0.1.0.0
%e A146624 .1.1.1.1.0.1.0.0
%e A146624 .0.0.0.0.0.1.1.0
%e A146624 .0.1.1.0.0.0.0.0
%e A146624 .0.0.1.0.1.1.1.1
%e A146624 .0.0.1.0.1.0.0.1
%e A146624 .0.1.1.0.0.0.0.0
%Y A146624 Sequence in context: A154935 A012480 A063611 this_sequence A006188 A139597 
               A117747
%Y A146624 Adjacent sequences: A146621 A146622 A146623 this_sequence A146625 A146626 
               A146627
%K A146624 nonn
%O A146624 1,7
%A A146624 Ron Hardin (rhhardin(AT)att.net), Nov 04 2008