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%I #6 Aug 12 2016 06:53:59
%S 2,101,6152,442285,34667512,2875874396,248188720768,22053860939581,
%T 2004232543930760,185418855352374916,17404087748977051168,
%U 1653341486254703216284,158659220471195369806688
%N Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its north neighbor modulo 4 and the upper left element equal to 0.
%C Row 4 of A266455.
%H R. H. Hardin, <a href="/A266457/b266457.txt">Table of n, a(n) for n = 1..39</a>
%e Some solutions for n=3
%e ..0..2..3....0..3..0....0..1..2....0..0..1....0..2..3....0..1..2....0..2..1
%e ..2..1..1....2..1..3....3..3..2....0..2..3....0..2..2....3..3..0....3..1..0
%e ..0..3..0....1..0..2....2..3..0....3..1..2....0..1..1....3..2..2....3..3..0
%e ..2..1..3....1..3..2....1..1..0....3..1..2....3..3..1....1..0..1....1..2..2
%Y Cf. A266455.
%K nonn
%O 1,1
%A _R. H. Hardin_, Dec 29 2015
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