A197542 - OEIS

%I #5 Mar 31 2012 12:36:30

%S 4,28,61,206,494,2095,6279,21530,69977,248366,813400,2838023,9457181,

%T 32284759,108523371,370702868,1251432293,4258479323,14389442735,

%U 48816423022,165305055080,561221682936,1901461841900,6447263273359

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

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

%C Column 5 of A197545

%H R. H. Hardin, <a href="/A197542/b197542.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..1..2..2..1....1..2..2..1..0....1..1..0..1..2....1..2..2..1..0

%e ..1..3..1..1..0....3..1..1..3..1....2..2..1..4..1....3..1..1..3..1

%e ..2..2..1..4..1....1..4..1..2..2....1..3..1..1..0....1..4..1..2..2

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 16 2011