Search: id:A146155
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%I A146155
%S A146155 1,1,1,1,3,7,14,42,163,719,3628,22263,164206,1435593,15071126,189778079,
%T A146155 2837151684,50511089269,1077365551719,27499985838212,837318042012350,
%U A146155 30417349994865723,1319974251781005014,68432608866087524550
%N A146155 Number of n X n binary arrays symmetric about main diagonal with all 
               ones connected only either as two by three or three by two blocks.
%e A146155 Maximal 8 X 8 example
%e A146155 .0.0.0.1.1.0.0.0
%e A146155 .0.0.0.1.1.0.0.0
%e A146155 .0.0.0.1.1.0.0.0
%e A146155 .1.1.1.0.0.0.1.1
%e A146155 .1.1.1.0.0.0.1.1
%e A146155 .0.0.0.0.0.0.1.1
%e A146155 .0.0.0.1.1.1.0.0
%e A146155 .0.0.0.1.1.1.0.0
%Y A146155 Sequence in context: A079939 A147006 A146936 this_sequence A106363 A128658 
               A001203
%Y A146155 Adjacent sequences: A146152 A146153 A146154 this_sequence A146156 A146157 
               A146158
%K A146155 nonn
%O A146155 1,5
%A A146155 Ron Hardin (rhhardin(AT)att.net), Oct 27 2008

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