A196435 - OEIS

%I #5 Mar 31 2012 12:36:26

%S 13,178,1801,21803,246463,2856711,32855368,378154308,4356726770,

%T 50163397373,577634629068,6651858481248,76599144629883,

%U 882067405853789,10157379663581632,116966622243380304,1346919921065307751

%N Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,1,0,3,4 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 0's, every 3 is next to 3 3's, every 4 is next to 4 4's

%C Column 7 of A196436

%H R. H. Hardin, <a href="/A196435/b196435.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 02 2011