%I #4 Jan 24 2016 14:12:01

%S 63,3969,250047,13530274,687233742,32747526923,1486191908610,

%T 64725260937166,2722665554883854,111163751115106132,

%U 4422667685678114786,172002220213857351197,6556076286013521999466,245446300682062937711088

%N Number of 4Xn 0..2 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value.

%C Row 4 of A268026.

%H R. H. Hardin, <a href="/A268028/b268028.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

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

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

%Y Cf. A268026.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 24 2016