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Number of nX2 0..4 arrays with every row and column running average nondecreasing rightwards and downwards
1

%I #5 Mar 31 2012 12:36:41

%S 15,105,647,3728,20656,111222,586908,3047226,15620118,79228317,

%T 398364306,1988133262,9858922561,48617189158,238575216150,

%U 1165684780558,5673701149975,27520684819357,133080240201400,641746039540686

%N Number of nX2 0..4 arrays with every row and column running average nondecreasing rightwards and downwards

%C Column 2 of A200858

%H R. H. Hardin, <a href="/A200852/b200852.txt">Table of n, a(n) for n = 1..140</a>

%e Some solutions for n=3

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

%e ..1..4....0..1....2..3....0..3....2..3....1..4....0..3....2..2....3..3....1..4

%e ..4..4....0..1....3..4....3..3....4..4....1..3....3..4....2..4....3..4....4..4

%K nonn

%O 1,1

%A _R. H. Hardin_ Nov 23 2011