Search: id:A147146
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%I A147146
%S A147146 1,1,1,1,3,9,19,67,271,1339,7503,48863,386667,3842993,45897369,657696677
%N A147146 Number of n X n binary arrays symmetric under 180 degree rotation with 
               all ones connected only in a 1000-1100-0110-0011 pattern in any orientation.
%e A147146 Maximal 8 X 8 example
%e A147146 .0.0.1.1.0.0.0.0
%e A147146 .0.1.1.0.0.0.0.1
%e A147146 .1.1.0.0.0.0.1.1
%e A147146 .1.0.1.1.0.1.1.0
%e A147146 .0.1.1.0.1.1.0.1
%e A147146 .1.1.0.0.0.0.1.1
%e A147146 .1.0.0.0.0.1.1.0
%e A147146 .0.0.0.0.1.1.0.0
%Y A147146 Sequence in context: A146605 A147070 A130586 this_sequence A146066 A164283 
               A033315
%Y A147146 Adjacent sequences: A147143 A147144 A147145 this_sequence A147147 A147148 
               A147149
%K A147146 nonn
%O A147146 1,5
%A A147146 Ron Hardin (rhhardin(AT)att.net), Nov 04 2008

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