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A267743 Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any west or northeast neighbors modulo 4 and the upper left element equal to 0. 1

%I

%S 6,5,26,123,633,3428,18899,106599,618585,3674665,22190640,135570897,

%T 835884024,5196879659,32568136350,205609418532,1306436325774,

%U 8346088687406,53563228719519,345155128538327,2232566289999786

%N Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any west or northeast neighbors modulo 4 and the upper left element equal to 0.

%C Row 4 of A267742.

%H R. H. Hardin, <a href="/A267743/b267743.txt">Table of n, a(n) for n = 1..31</a>

%e Some solutions for n=4

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

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

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

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

%Y Cf. A267742.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 20 2016

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Last modified October 20 03:04 EDT 2021. Contains 348099 sequences. (Running on oeis4.)