%I #6 Mar 31 2012 12:36:35
%S 5,709,127973,26249645,5813473253,1354962283005,327517079413293,
%T 81354547180103625,20640739602876893733,5326171952368494472061,
%U 1393506059395687309946181,368808221492178082683574433
%N Number of 4nX2 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and every element equal to exactly one horizontal or vertical neighbor
%C 4n terms of column 2 of A199092
%H R. H. Hardin, <a href="/A199089/b199089.txt">Table of n, a(n) for n = 1..22</a>
%e Some solutions for 12X2
%e ..0..1....0..1....0..1....0..0....0..0....0..1....0..1....0..1....0..1....0..1
%e ..0..1....0..1....0..1....1..1....1..1....0..1....0..1....0..1....0..1....0..1
%e ..2..3....2..2....2..0....2..0....2..2....2..2....2..3....2..2....2..3....2..2
%e ..2..3....1..1....2..0....2..0....3..0....3..1....2..3....3..3....2..3....3..3
%e ..3..0....3..0....3..3....3..3....3..0....3..1....1..1....0..0....3..1....2..2
%e ..3..0....3..0....2..0....1..1....1..1....2..2....3..3....1..1....3..1....1..1
%e ..2..1....2..2....2..0....2..2....3..2....3..3....2..2....3..3....0..0....3..3
%e ..2..1....1..3....3..1....3..3....3..2....0..2....0..3....0..0....2..2....0..0
%e ..1..3....1..3....3..1....2..2....1..1....0..2....0..3....2..2....1..1....2..3
%e ..1..3....3..2....2..2....3..1....3..3....1..1....2..1....1..3....0..0....2..3
%e ..2..2....3..2....3..1....3..1....2..0....3..0....2..1....1..3....3..2....1..0
%e ..0..0....0..0....3..1....0..0....2..0....3..0....0..0....2..2....3..2....1..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Nov 02 2011