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Half the number of (n+1)X7 binary arrays with no 2X2 subblock containing exactly one 1
1

%I #5 Mar 31 2012 12:35:57

%S 1908,90185,3901193,174401423,7751834608,345350598641,15380031974284,

%T 685056630399242,30513075478492147,1359098254767356165,

%U 60536202458667509811,2696372582587335783277,120100441888134027505701

%N Half the number of (n+1)X7 binary arrays with no 2X2 subblock containing exactly one 1

%C Column 6 of A184197

%H R. H. Hardin, <a href="/A184194/b184194.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 3X7

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 10 2011