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Number of nX7 0..6 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors
0

%I #4 Mar 31 2012 12:36:56

%S 1,86156,1678700434,10639041328647,61265314914283103

%N Number of nX7 0..6 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors

%C Column 7 of A203389

%e Some solutions for n=4

%e ..4..4..2..2..0..4..4....4..4..3..3..0..4..4....0..5..5..5..4..5..5

%e ..4..6..6..2..5..5..4....6..6..3..4..4..4..4....5..5..5..6..6..5..5

%e ..4..6..6..3..5..5..2....6..6..3..4..5..5..4....5..0..4..6..6..5..3

%e ..0..1..1..0..0..0..0....5..5..0..0..5..5..0....5..5..5..5..0..0..0

%K nonn

%O 1,2

%A _R. H. Hardin_ Jan 01 2012