Search: id:A147510
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%I A147510
%S A147510 1,1,1,1,1,1,1,1,1,1,1,1,3,3,9,9,23,23,81,81,267,267,1053,1053,6173,6173
%N A147510 Number of n X n binary arrays symmetric about the diagonal and under 
               90 degree rotation with all ones connected only in a 11110-01111 
               pattern in any orientation.
%e A147510 Maximal 13 X 13 example
%e A147510 .0.0.0.0.1.0.0.0.1.0.0.0.0
%e A147510 .0.0.0.0.1.1.0.1.1.0.0.0.0
%e A147510 .0.0.0.0.1.1.0.1.1.0.0.0.0
%e A147510 .0.0.0.0.1.1.0.1.1.0.0.0.0
%e A147510 .1.1.1.1.0.1.0.1.0.1.1.1.1
%e A147510 .0.1.1.1.1.0.0.0.1.1.1.1.0
%e A147510 .0.0.0.0.0.0.0.0.0.0.0.0.0
%e A147510 .0.1.1.1.1.0.0.0.1.1.1.1.0
%e A147510 .1.1.1.1.0.1.0.1.0.1.1.1.1
%e A147510 .0.0.0.0.1.1.0.1.1.0.0.0.0
%e A147510 .0.0.0.0.1.1.0.1.1.0.0.0.0
%e A147510 .0.0.0.0.1.1.0.1.1.0.0.0.0
%e A147510 .0.0.0.0.1.0.0.0.1.0.0.0.0
%Y A147510 Sequence in context: A146820 A146663 A146394 this_sequence A146474 A145957 
               A128019
%Y A147510 Adjacent sequences: A147507 A147508 A147509 this_sequence A147511 A147512 
               A147513
%K A147510 nonn
%O A147510 1,13
%A A147510 Ron Hardin (rhhardin(AT)att.net)

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