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 A199128 Number of nX3 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor 2

%I

%S 1,2,6,19,70,264,1038,4155,16896,69584,289146,1211873,5111178,

%T 21686612,92453594,395888507,1701506820,7337867736,31739124866,

%U 137656095241,598476364166,2607710997676,11385288787534,49800060551081

%N Number of nX3 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor

%C Column 3 of A199133

%H R. H. Hardin, <a href="/A199128/b199128.txt">Table of n, a(n) for n = 1..130</a>

%e Some solutions for n=5

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

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Nov 03 2011

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Last modified April 9 17:26 EDT 2020. Contains 333361 sequences. (Running on oeis4.)