Search: id:A147264
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%I A147264
%S A147264 1,1,1,1,1,5,15,33,77,553,3895,24243,170053,2059185,30409467,474043707,
%T A147264 8705603341,222308455647,7060172178631,259928502701315
%N A147264 Number of n X n binary arrays symmetric about main diagonal with all 
               ones connected only in a 0100-1100-0111-0001 pattern in any orientation.
%e A147264 Maximal 8 X 8 example
%e A147264 .0.0.0.0.0.0.0.0
%e A147264 .0.0.0.0.0.0.1.1
%e A147264 .0.0.0.0.0.0.1.0
%e A147264 .0.0.0.0.1.1.1.0
%e A147264 .0.0.0.1.0.1.0.0
%e A147264 .0.0.0.1.1.0.0.0
%e A147264 .0.1.1.1.0.0.0.0
%e A147264 .0.1.0.0.0.0.0.0
%Y A147264 Sequence in context: A155013 A134887 A055004 this_sequence A147150 A006003 
               A111385
%Y A147264 Adjacent sequences: A147261 A147262 A147263 this_sequence A147265 A147266 
               A147267
%K A147264 nonn
%O A147264 1,6
%A A147264 Ron Hardin (rhhardin(AT)att.net), Nov 04 2008

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