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 A267074 Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its west or southwest neighbor modulo 4 and the upper left element equal to 0. 1

%I

%S 6,44,1129,30637,775567,21970109,676906680,21300928198,681356875633,

%T 22263527673539,739749532618244,24869575479353155,844359305686979781,

%U 28920001414149308262,998012306992020016156,34663335569939361225767

%N Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its west or southwest neighbor modulo 4 and the upper left element equal to 0.

%C Row 4 of A267072.

%H R. H. Hardin, <a href="/A267074/b267074.txt">Table of n, a(n) for n = 1..20</a>

%e Some solutions for n=4

%e ..0..2..1..0....0..0..3..1....0..3..1..0....0..0..2..1....0..2..0..2

%e ..3..2..0..2....1..1..1..3....1..3..2..1....2..2..1..0....2..1..3..1

%e ..2..1..0..3....3..2..0..2....1..3..2..0....0..3..1..1....2..0..3..1

%e ..1..1..3..3....2..0..3..2....0..3..2..2....3..3..3..2....0..3..3..1

%Y Cf. A267072.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 10 2016

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Last modified November 29 14:23 EST 2020. Contains 338769 sequences. (Running on oeis4.)