Search: id:A147215
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%I A147215
%S A147215 1,1,1,1,1,1,1,17,41,71,215,773,2523,9517,44347,255961,1482711,8989887,
%T A147215 64060215,492775957,4232478379
%N A147215 Number of n X n binary arrays symmetric under 90 degree rotation with 
               all ones connected only in a 1100-0111-0011 pattern in any orientation.
%e A147215 Maximal 8 X 8 example
%e A147215 .0.0.0.0.0.1.1.0
%e A147215 .1.0.0.1.1.1.0.0
%e A147215 .1.1.0.1.1.0.0.0
%e A147215 .0.1.1.0.0.1.1.0
%e A147215 .0.1.1.0.0.1.1.0
%e A147215 .0.0.0.1.1.0.1.1
%e A147215 .0.0.1.1.1.0.0.1
%e A147215 .0.1.1.0.0.0.0.0
%Y A147215 Sequence in context: A087658 A078655 A052279 this_sequence A126790 A089200 
               A004625
%Y A147215 Adjacent sequences: A147212 A147213 A147214 this_sequence A147216 A147217 
               A147218
%K A147215 nonn
%O A147215 1,8
%A A147215 Ron Hardin (rhhardin(AT)att.net), Nov 04 2008

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