A230896 - OEIS

A230896

Number of nX5 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero

%I #4 Oct 31 2013 14:42:38

%S 0,22,198,2722,40762,579218,8554562,124839450,1831199914,26824899050,

%T 393121474162,5761002173582,84425792197234,1237258764791130,

%U 18131988405606650,265725095549831286,3894214169501544162

%N Number of nX5 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero

%C Column 5 of A230899

%H R. H. Hardin, <a href="/A230896/b230896.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,2

%A _R. H. Hardin_, Oct 31 2013