login
Number of 2Xn 0..3 arrays with no more than floor(2Xn/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order
1

%I #4 Mar 12 2013 18:35:19

%S 2,8,98,1265,17356,241583,3395532,48048796,683306658,9759462283,

%T 139866408792,2010279482902,28963821801648,418182844095108,

%U 6048773850787538,87632133398349504,1271377018275506438

%N Number of 2Xn 0..3 arrays with no more than floor(2Xn/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order

%C Row 2 of A223041

%H R. H. Hardin, <a href="/A223042/b223042.txt">Table of n, a(n) for n = 1..61</a>

%e Some solutions for n=3

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 12 2013