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%I #5 Mar 31 2012 12:36:25
%S 1,21,82,105,92,410,945,1919,4478,10274,27467,73240,184074,475431,
%T 1290711,3500703,9203789,24842074,67959738,185261546,500164424,
%U 1364785665,3747581211,10238569012,27972042011,76776169280,210809165289
%N Number of nX7 0..4 arrays with each element equal to the number its horizontal and vertical neighbors unequal to itself
%C Column 7 of A195962
%H R. H. Hardin, <a href="/A195961/b195961.txt">Table of n, a(n) for n = 1..173</a>
%e Some solutions for n=5
%e ..2..1..1..1..1..1..1....1..2..2..3..2..2..1....1..3..2..2..3..2..1
%e ..1..1..4..3..3..4..3....1..3..3..4..3..3..1....1..4..3..3..4..2..1
%e ..1..1..1..1..1..1..1....1..1..1..1..1..1..1....1..2..2..2..2..2..1
%e ..3..4..1..1..1..1..1....3..1..1..1..1..1..3....1..2..4..3..3..4..1
%e ..1..1..1..2..2..3..2....1..1..3..2..2..1..1....1..2..3..2..2..3..1
%K nonn
%O 1,2
%A _R. H. Hardin_ Sep 25 2011
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