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A230472 Number of 4Xn 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero 1

%I

%S 0,8,1384,76518,3062214,131421154,5660619846,245148922672,

%T 10602405238156,458539032665354,19829852540702200,857572844510153520,

%U 37087106370781509158,1603891953715654451316,69362889010577734405252

%N Number of 4Xn 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3, and upper left element zero

%C Row 4 of A230469

%H R. H. Hardin, <a href="/A230472/b230472.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A230472/a230472.txt">Empirical recurrence of order 57</a>

%F Empirical recurrence of order 57 (see link above)

%e Some solutions for n=3

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Oct 20 2013

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Last modified August 16 05:55 EDT 2022. Contains 356160 sequences. (Running on oeis4.)