A196635 - OEIS

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

%S 1,161,2716,61040,1339251,29718190,651323279,14313363492,314536084653,

%T 6918341058099,152091254605720,3343887108564234,73523096683740016,

%U 1616580075894214591,35544361135805663463,781529666441604010638

%N Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 1,3,2,0,4 for x=0,1,2,3,4

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

%C Column 7 of A196636

%H R. H. Hardin, <a href="/A196635/b196635.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Oct 04 2011