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A222880 Number of 3Xn 0..3 arrays with no more than floor(3Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order 1

%I

%S 5,131,6282,409775,19707855,1340197778,66248732403,4552388850792,

%T 228017377191609,15767959380970741,797585318305106129,

%U 55339415802965980962,2819443488435447752525,196019624814751455019691

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

%C Row 3 of A222878

%H R. H. Hardin, <a href="/A222880/b222880.txt">Table of n, a(n) for n = 1..22</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 08 2013

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Last modified June 25 17:46 EDT 2022. Contains 354851 sequences. (Running on oeis4.)