%I #6 Aug 12 2016 06:54:17
%S 4,54,574,6404,72110,816583,9323584,107089479,1236171969,14324836704,
%T 166516037345,1940477033553,22659370920439,265044574417791,
%U 3104569328697374,36408281098910933,427405044547342278
%N Number of 3Xn arrays containing n copies of 0..3-1 avoiding the pattern down-up in every row and equal-up in every column.
%C Row 3 of A269479.
%H R. H. Hardin, <a href="/A269480/b269480.txt">Table of n, a(n) for n = 1..49</a>
%e Some solutions for n=4
%e ..2..0..1..0. .1..1..0..0. .2..0..1..2. .2..0..1..1. .1..0..2..0
%e ..2..1..1..0. .2..1..0..0. .2..0..1..2. .2..0..2..2. .1..2..1..0
%e ..0..2..2..1. .1..2..2..2. .1..1..0..0. .0..1..0..1. .0..2..1..2
%Y Cf. A269479.
%K nonn
%O 1,1
%A _R. H. Hardin_, Feb 27 2016
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