A230924 - OEIS

%I #4 Nov 01 2013 17:32:02

%S 0,22428,2772906,1509045552,635678359988,270258566366420,

%T 115824906242444524,49485565220035538028,21156805616540924557940,

%U 9044496465346856530533020,3866495604500081195895769776

%N Number of nX6 0..2 arrays x(i,j) with each element horizontally, vertically, diagonally or antidiagonally next to at least one element with value (x(i,j)+1) mod 3 and at least one element with value (x(i,j)-1) mod 3, and upper left element zero

%C Column 6 of A230926

%H R. H. Hardin, <a href="/A230924/b230924.txt">Table of n, a(n) for n = 1..117</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 01 2013