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%I #6 Aug 12 2016 06:54:16
%S 6,54,924,19696,456052,11169884,284749896,7478180356,200946163564,
%T 5498658652872,152701830225328,4292791741022352,121927662325745128,
%U 3493616278749683152,100864166949775322480,2931337070411050352250
%N Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any northeast neighbor modulo 4 and the upper left element equal to 0.
%C Row 4 of A267836.
%H R. H. Hardin, <a href="/A267837/b267837.txt">Table of n, a(n) for n = 1..40</a>
%e Some solutions for n=4
%e ..0..1..2..1....0..2..1..1....0..2..3..1....0..0..1..1....0..3..1..3
%e ..2..3..1..3....2..1..2..3....3..3..1..0....0..1..1..2....0..2..3..1
%e ..0..2..3..0....1..2..0..3....3..2..0..0....2..2..3..3....3..0..1..2
%e ..3..0..1..2....3..0..0..3....2..1..1..2....2..3..3..0....0..2..2..1
%Y Cf. A267836.
%K nonn
%O 1,1
%A _R. H. Hardin_, Jan 21 2016
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