A210352 - OEIS

%I #5 Mar 31 2012 12:37:33

%S 530580,416960476,320128196268,248817068842201,193382034306882852,

%T 150365005774145044378,116921261170364094516762,

%U 90917952546400064866847175,70698050852648393486040104724

%N 1/4 the number of (n+1)X6 0..3 arrays with every 2X2 subblock having one, two or three distinct clockwise edge differences

%C Column 5 of A210355

%H R. H. Hardin, <a href="/A210352/b210352.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 20 2012