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A223002 Number of 3Xn 0..2 arrays with no more than floor(3Xn/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order 1

%I #4 Mar 11 2013 10:09:51

%S 5,51,534,11114,125907,2889947,34120953,797183427,9564934420,

%T 226055677091,2742385557524,65313538746516,798398966331091,

%U 19117977479368059,235001631223835081,5649894487466132633

%N Number of 3Xn 0..2 arrays with no more than floor(3Xn/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order

%C Row 3 of A223000

%H R. H. Hardin, <a href="/A223002/b223002.txt">Table of n, a(n) for n = 1..51</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 11 2013

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Last modified April 25 04:42 EDT 2024. Contains 371964 sequences. (Running on oeis4.)