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%I #7 Mar 31 2012 12:36:54
%S 4,120,4740,191208,8536230,396419436,18828234948,912456343092,
%T 44877327059082,2232846723233916,112156061708925570,
%U 5678174300220035688,289386692411558932884,14832527343262783621824,763984636989973669144320
%N Number of 3Xn 0..3 arrays with row sums equal and column sums unequal to adjacent columns
%C Row 3 of A203031
%H R. H. Hardin, <a href="/A203033/b203033.txt">Table of n, a(n) for n = 1..16</a>
%e Some.solutions.for.n=5
%e ..2..3..0..3..2....1..2..0..0..3....3..2..3..3..2....2..0..1..1..0
%e ..2..1..1..3..3....0..0..3..1..2....3..1..3..3..3....3..0..0..0..1
%e ..3..1..2..1..3....3..0..2..0..1....3..2..2..3..3....1..0..0..1..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Dec 27 2011
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