A222675 - OEIS

%I #4 Feb 28 2013 09:16:30

%S 4,10,58,527,8276,133028,2363628,40206464,727306856,12525102179,

%T 225526086320,3916711645116,70238669794180,1227292294581568,

%U 21942415435228510,385251466640023275,6872913615981792520

%N Number of nX4 0..3 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order

%C Column 4 of A222679

%H R. H. Hardin, <a href="/A222675/b222675.txt">Table of n, a(n) for n = 1..87</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 28 2013