A197441 - OEIS

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

%S 400,644328,746250884,811669674888,903529041581340,

%T 1002605692717130692,1112998745351676081292,1235511655153578238343970,

%U 1371513250568819862402121642,1522485346268679493501795851082

%N Number of nX7 0..2 arrays with no element equal to the average of its horizontal and vertical neighbors

%C Column 7 of A197442

%H R. H. Hardin, <a href="/A197441/b197441.txt">Table of n, a(n) for n = 1..11</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 15 2011