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A231041 Number of 5Xn 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 at least one element with value (x(i,j)-1) mod 3, and upper left element zero 1

%I #4 Nov 03 2013 06:46:33

%S 0,2,278,20250,783848,79772488,5472540636,439734512038,32779172536324,

%T 2528383081956048,192252299440875736,14709518845671963492,

%U 1122375608553171253262,85742995996289464755458

%N Number of 5Xn 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 at least one element with value (x(i,j)-1) mod 3, and upper left element zero

%C Row 5 of A231037

%H R. H. Hardin, <a href="/A231041/b231041.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 03 2013

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Last modified March 29 05:41 EDT 2024. Contains 371264 sequences. (Running on oeis4.)