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Number of nX4 0..4 arrays with values 0..4 introduced in row major order and each element equal to at least one horizontal or vertical neighbor
1

%I #5 Mar 31 2012 12:36:34

%S 2,76,3893,322230,30407251,3075124662,316137386807,32741782389619,

%T 3397146912481247,352742075116393899,36634081239038426907,

%U 3804936727099857364455,395201634386514861187551

%N Number of nX4 0..4 arrays with values 0..4 introduced in row major order and each element equal to at least one horizontal or vertical neighbor

%C Column 4 of A198708

%H R. H. Hardin, <a href="/A198704/b198704.txt">Table of n, a(n) for n = 1..124</a>

%e Some solutions with all values 0 to 4 for n=3

%e ..0..0..1..1....0..0..1..1....0..0..1..1....0..0..1..2....0..1..1..2

%e ..2..0..3..4....2..2..3..3....2..2..3..3....3..1..1..2....0..3..1..2

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 29 2011