A209046 - OEIS

%I #5 Mar 31 2012 12:37:26

%S 2916,15778340,86878417604,478881915072688,2640002203816927226,

%T 14554067523333615991960,80235179157233210417254036,

%U 442328880747673272994524595152,2438516891360121789946284774426192

%N Number of nX7 0..3 arrays with no element equal the average of immediate neighbors vertically above and horizontally left of it

%C Column 7 of A209047

%H R. H. Hardin, <a href="/A209046/b209046.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 04 2012