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A222914 Number of nX3 0..2 arrays with exactly floor(nX3/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order 1

%I #4 Mar 09 2013 08:11:04

%S 0,18,160,2952,17518,356398,2118905,44960137,272872198,5911110630,

%T 36457959703,799084046960,4981910445036,110019357014516,

%U 690925392478349,15339905237756384,96831631047966404,2158535060733668360

%N Number of nX3 0..2 arrays with exactly floor(nX3/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order

%C Column 3 of A222918

%H R. H. Hardin, <a href="/A222914/b222914.txt">Table of n, a(n) for n = 1..169</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Mar 09 2013

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Last modified August 9 16:51 EDT 2024. Contains 375044 sequences. (Running on oeis4.)