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Number of nX4 0,1 arrays with the row and column sums nondecreasing
1

%I #5 Mar 31 2012 12:36:48

%S 5,37,235,1526,9325,57255,342295,2048759,12097875,71623580,421070137,

%T 2483305077,14588495861,85996521989,505767515227,2984447588198,

%U 17583885515973,103920730449567,613473612747653,3631554358770128

%N Number of nX4 0,1 arrays with the row and column sums nondecreasing

%C Column 4 of A202560

%H R. H. Hardin, <a href="/A202556/b202556.txt">Table of n, a(n) for n = 1..46</a>

%e Some solutions for n=6

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 21 2011