A197447 - OEIS

%I #5 Mar 31 2012 12:36:29

%S 7,107,2678,52117,1108699,23829080,504568165,10724642167,228248265080,

%T 4853181015432,103200753393047,2194748772730124,46673287485335449,

%U 992547357156970890,21107504726738892508,448871249985110511395

%N Number of nX5 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,1,0,0 for x=0,1,2,3,4

%C Every 0 is next to 0 2's, every 1 is next to 1 1's, every 2 is next to 2 1's, every 3 is next to 3 0's, every 4 is next to 4 0's

%C Column 5 of A197450

%H R. H. Hardin, <a href="/A197447/b197447.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions containing all values 0 to 4 for n=4

%e ..0..3..0..3..0....0..3..0..3..0....0..0..0..0..0....0..0..0..3..0

%e ..1..0..0..0..0....1..0..4..0..3....1..0..4..0..0....0..0..4..0..1

%e ..1..0..0..4..0....1..0..0..4..0....1..0..0..0..3....0..0..0..0..1

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 15 2011