Search: id:A146664
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%I A146664
%S A146664 1,1,1,1,1,1,3,19,43,87,303,1077,3757,15681,80673,475263,2975253,
%T A146664 20229343,160250909,1366441107,13345035623
%N A146664 Number of n X n binary arrays symmetric under 90 degree rotation with 
               all ones connected only in a 1100-0111-0001 pattern in any orientation.
%e A146664 Maximal 8 X 8 example
%e A146664 .0.0.0.0.0.1.1.0
%e A146664 .1.0.0.1.1.1.0.0
%e A146664 .1.1.0.1.0.0.0.0
%e A146664 .0.1.0.0.0.1.1.0
%e A146664 .0.1.1.0.0.0.1.0
%e A146664 .0.0.0.0.1.0.1.1
%e A146664 .0.0.1.1.1.0.0.1
%e A146664 .0.1.1.0.0.0.0.0
%Y A146664 Sequence in context: A146704 A103145 A100694 this_sequence A103176 A028880 
               A162905
%Y A146664 Adjacent sequences: A146661 A146662 A146663 this_sequence A146665 A146666 
               A146667
%K A146664 nonn
%O A146664 1,7
%A A146664 Ron Hardin (rhhardin(AT)att.net), Nov 04 2008

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