Search: id:A147227
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%I A147227
%S A147227 1,1,1,1,1,1,2,3,6,9,16,23,72,177,631,1684,5696,15819,69884,263612,
%T A147227 1492069,6667995,40872228,203062570,1480955534,9070964673,81908729534
%N A147227 Number of n X n binary arrays symmetric about both diagonal and antidiagonal 
               with all ones connected only in a 11011-01110 pattern in any orientation.
%e A147227 Maximal 8 X 8 example
%e A147227 .0.0.1.1.0.1.1.0
%e A147227 .0.0.0.1.1.1.0.1
%e A147227 .1.0.0.0.0.0.1.1
%e A147227 .1.1.0.0.0.0.1.0
%e A147227 .0.1.0.0.0.0.1.1
%e A147227 .1.1.0.0.0.0.0.1
%e A147227 .1.0.1.1.1.0.0.0
%e A147227 .0.1.1.0.1.1.0.0
%Y A147227 Sequence in context: A115995 A051057 A147364 this_sequence A147063 A007865 
               A052812
%Y A147227 Adjacent sequences: A147224 A147225 A147226 this_sequence A147228 A147229 
               A147230
%K A147227 nonn
%O A147227 1,7
%A A147227 Ron Hardin (rhhardin(AT)att.net), Nov 04 2008

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