A209784 - OEIS

%I #5 Mar 31 2012 12:37:30

%S 397734,122871278,36572974507,11197401806412,3413352967754696,

%T 1043428174053823487,318751987571164698772,97407366419231553054246,

%U 29763727089493837413742773,9094996467359607511188778436

%N Half the number of (n+1)X6 0..3 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference

%C Column 5 of A209787

%H R. H. Hardin, <a href="/A209784/b209784.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 13 2012