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%I #6 Aug 12 2016 06:54:00
%S 6,35,458,7137,127262,2409733,47615756,971807573,20350582884,
%T 435153995835,9465755318980,208865043851697,4664235238647148,
%U 105225575250055043,2394702914722332876,54911344462256296581
%N Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its west, northeast or southeast neighbor modulo 4 and the upper left element equal to 0.
%C Row 4 of A267222.
%H R. H. Hardin, <a href="/A267224/b267224.txt">Table of n, a(n) for n = 1..19</a>
%e Some solutions for n=4
%e ..0..3..3..2....0..2..2..1....0..2..1..3....0..2..1..1....0..3..2..2
%e ..2..2..0..3....1..1..0..3....2..0..3..3....0..0..3..3....1..1..0..0
%e ..1..0..2..1....0..3..2..1....0..2..1..1....2..2..1..3....1..3..2..0
%e ..3..1..1..0....2..0..3..3....2..0..3..1....2..0..3..1....3..1..3..2
%Y Cf. A267222.
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 12 2016
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