Search: id:A147479
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%I A147479
%S A147479 1,1,1,1,1,1,1,9,20,33,56,123,372,1117,3761,13503
%N A147479 Number of n X n binary arrays symmetric under 90 degree rotation with 
               all ones connected only in a 1100-1111-1100 pattern in any orientation.
%e A147479 Maximal 8 X 8 example
%e A147479 .0.0.0.0.1.1.1.0
%e A147479 .1.1.0.0.1.1.1.0
%e A147479 .1.1.1.1.0.1.0.0
%e A147479 .1.1.0.0.0.1.0.0
%e A147479 .0.0.1.0.0.0.1.1
%e A147479 .0.0.1.0.1.1.1.1
%e A147479 .0.1.1.1.0.0.1.1
%e A147479 .0.1.1.1.0.0.0.0
%Y A147479 Sequence in context: A017497 A059108 A028566 this_sequence A146680 A143704 
               A128153
%Y A147479 Adjacent sequences: A147476 A147477 A147478 this_sequence A147480 A147481 
               A147482
%K A147479 nonn
%O A147479 1,8
%A A147479 Ron Hardin (rhhardin(AT)att.net)

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