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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. 0

%I

%S 1,1,1,1,3,7,14,42,163,719,3628,22263,164206,1435593,15071126,

%T 189778079,2837151684,50511089269,1077365551719,27499985838212,

%U 837318042012350,30417349994865723,1319974251781005014,68432608866087524550

%N 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 Maximal 8 X 8 example

%e .0.0.0.1.1.0.0.0

%e .0.0.0.1.1.0.0.0

%e .0.0.0.1.1.0.0.0

%e .1.1.1.0.0.0.1.1

%e .1.1.1.0.0.0.1.1

%e .0.0.0.0.0.0.1.1

%e .0.0.0.1.1.1.0.0

%e .0.0.0.1.1.1.0.0

%K nonn

%O 1,5

%A _R. H. Hardin_, Oct 27 2008

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Last modified June 24 00:14 EDT 2021. Contains 345403 sequences. (Running on oeis4.)