A222473 - OEIS

%I #5 Feb 21 2013 13:51:44

%S 1,1,1,10,11,126,139,2033,2229,36255,39685,667198,729937,12434879,

%T 13604769,233248961,255262081,4393917596,4810289617,83052210509,

%U 90956522613,1574365187384,1724848374973,29920297244921,32792034611531

%N Number of nX2 0..3 arrays with no more than floor(nX2/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order

%C Column 2 of A222479

%H R. H. Hardin, <a href="/A222473/b222473.txt">Table of n, a(n) for n = 1..210</a>

%e All solutions for n=4

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

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

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

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

%K nonn

%O 1,4

%A _R. H. Hardin_ Feb 21 2013