A251115 - OEIS

%I #4 Nov 30 2014 07:25:00

%S 2500,64660,1494029,27945953,480842776,7521121248,111353209662,

%T 1565216316524,21222352910300,278794962294706,3575143198989419,

%U 44910526954802560,554888528859073528,6760076062454651486

%N Number of (n+1)X(2+1) 0..3 arrays with nondecreasing maximum of every two consecutive values in every row and column

%C Column 2 of A251120

%H R. H. Hardin, <a href="/A251115/b251115.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 30 2014