A230925 - OEIS

A230925

Number of nX7 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

%I #4 Nov 01 2013 17:32:40

%S 0,162504,49910578,79222650048,95355343910570,115824906242444524,

%T 141918678589876907858,173323843525767598735246,

%U 211826848025262254855664570,258860991517808430443507237776

%N Number of nX7 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 7 of A230926

%H R. H. Hardin, <a href="/A230925/b230925.txt">Table of n, a(n) for n = 1..20</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 01 2013