A223122 - OEIS

%I #4 Mar 15 2013 05:29:34

%S 10,489,28907,1780641,112106293,7157970340,461597847603,

%T 29989116614529,1959625907209239,128645318481467647,

%U 8477443608456769792,560422268684443059564,37148157807866359018565,2468123723995159036467948

%N Number of nX4 0..2 arrays with no more than floor(nX4/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..2 order

%C Column 4 of A223126

%H R. H. Hardin, <a href="/A223122/b223122.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 15 2013