A209958 - OEIS

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

%S 2293335,2551206049,2818513213257,3117032354510683,

%T 3446585458126287199,3811099763671947037073,4214142277487028096606145,

%U 4659813766542802148450765851,5152616821080271113075357402295

%N Number of (n+1)X7 0..2 arrays with every 2X2 subblock having one, three or four distinct clockwise edge differences

%C Column 6 of A209960

%H R. H. Hardin, <a href="/A209958/b209958.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 16 2012