%I A147511
%S A147511 1,1,1,1,1,1,1,9,15,29,57,137,413,1389,4485,15371,54209,224739,1032991,
%T A147511 5497929,29140255,171761393,1058704295,7315438183
%N A147511 Number of n X n binary arrays symmetric under 90 degree rotation with 
               all ones connected only in a 11110-01111 pattern in any orientation.
%e A147511 Maximal 8 X 8 example
%e A147511 .1.0.0.0.1.1.1.1
%e A147511 .1.1.0.1.1.1.1.0
%e A147511 .1.1.0.0.0.0.0.0
%e A147511 .1.1.0.0.0.0.1.0
%e A147511 .0.1.0.0.0.0.1.1
%e A147511 .0.0.0.0.0.0.1.1
%e A147511 .0.1.1.1.1.0.1.1
%e A147511 .1.1.1.1.0.0.0.1
%Y A147511 Sequence in context: A046353 A046356 A060874 this_sequence A124580 A103508 
               A051246
%Y A147511 Adjacent sequences: A147508 A147509 A147510 this_sequence A147512 A147513 
               A147514
%K A147511 nonn
%O A147511 1,8
%A A147511 Ron Hardin (rhhardin(AT)att.net)