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A186819 Half the number of (n+2)X5 binary arrays with each 3X3 subblock having sum 4 or 5 1

%I #5 Mar 31 2012 12:36:06

%S 2904,25808,222632,2009622,18829218,175882357,1653336285,15639380661,

%T 147826932337,1399067559974,13257222778967,125596828357521,

%U 1190237476340344,11282323553231805,106939751216903914

%N Half the number of (n+2)X5 binary arrays with each 3X3 subblock having sum 4 or 5

%C Column 3 of A186825

%H R. H. Hardin, <a href="/A186819/b186819.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 4X5 with a(1,1)=0

%e ..0..1..0..0..1....0..0..1..1..0....0..1..1..0..1....0..0..1..0..1

%e ..1..1..0..1..1....1..1..0..0..1....0..1..0..0..1....0..0..1..0..0

%e ..0..0..1..0..0....1..0..0..1..1....1..1..0..1..0....0..1..1..0..0

%e ..0..0..1..0..1....0..1..0..1..1....1..0..1..0..1....0..0..1..0..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 27 2011

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Last modified April 23 20:33 EDT 2024. Contains 371916 sequences. (Running on oeis4.)