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Number of nX4 0..2 arrays with no element equal to exactly one horizontal or vertical neighbor, with new values 0..2 introduced in row major order
1

%I #6 Apr 15 2014 18:23:46

%S 4,39,386,4191,47974,572023,6996566,86779948,1085281623,13635536887,

%T 171768785341,2167009960686,27361588744430,345643091260812,

%U 4367483662096514,55195179067472373,697603829676805964

%N Number of nX4 0..2 arrays with no element equal to exactly one horizontal or vertical neighbor, with new values 0..2 introduced in row major order

%C Column 4 of A241078

%H R. H. Hardin, <a href="/A241075/b241075.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A241075/a241075.txt">Empirical recurrence of order 96</a>

%F Empirical recurrence of order 96 (see link above)

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 15 2014