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A230511 Number of nX4 0..7 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 8, and upper left element zero 1

%I #4 Oct 21 2013 20:50:04

%S 0,2,170,4648,129874,4038314,129829460,4177480490,133348597190,

%T 4239583476464,134710145140230,4281665864448554,136114979870612832,

%U 4327211619948091138,137562471021655686798,4373060580042549915844

%N Number of nX4 0..7 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 8, and upper left element zero

%C Column 4 of A230513

%H R. H. Hardin, <a href="/A230511/b230511.txt">Table of n, a(n) for n = 1..24</a>

%e Some solutions for n=3

%e ..0..1..2..3....0..1..2..3....0..3..2..1....0..1..0..7....0..7..0..7

%e ..7..0..1..4....5..0..7..4....1..4..5..0....1..2..3..4....1..2..1..6

%e ..6..7..6..5....6..7..6..5....2..3..6..7....0..7..6..5....2..3..4..5

%K nonn

%O 1,2

%A _R. H. Hardin_, Oct 21 2013

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Last modified April 20 05:25 EDT 2024. Contains 371798 sequences. (Running on oeis4.)