A223112 - OEIS

A223112

Number of nX4 0..2 arrays with exactly floor(nX4/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order

%I #4 Mar 14 2013 21:36:01

%S 6,124,5624,244607,10831996,488343248,22325434918,1030482342515,

%T 47916590696295,2241101562438012,105316304676988484,

%U 4968633132901498380,235188969754972369712,11164172762230170428454,531250275464927363854476

%N Number of nX4 0..2 arrays with exactly floor(nX4/2) elements equal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order

%C Column 4 of A223114

%H R. H. Hardin, <a href="/A223112/b223112.txt">Table of n, a(n) for n = 1..58</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 14 2013