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Half the number of (n+2)X5 binary arrays with no 3X3 subblock having a sum equal to any horizontal or vertical neighbor 3X3 subblock sum
1

%I #5 Mar 31 2012 12:36:10

%S 7744,53728,359488,2292560,16890700,122812784,860108472,6116839902,

%T 43092481644,298860635764,2133759439896,15149745081538,

%U 106412240118540,754706717902846,5335690343354458,37525816010840830,265952713606425686

%N Half the number of (n+2)X5 binary arrays with no 3X3 subblock having a sum equal to any horizontal or vertical neighbor 3X3 subblock sum

%C Column 3 of A187964

%H R. H. Hardin, <a href="/A187958/b187958.txt">Table of n, a(n) for n = 1..162</a>

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 16 2011