%I #5 Mar 31 2012 12:36:56
%S 15,510,15300,423595,10809576,261192161,6027116491,134485617080,
%T 2917085859508,61924067072669,1290589596346709,26510790447480014,
%U 537817266328044268,10801401586708316358,215047466285433025231
%N Number of nX4 0..2 arrays with the row and column sums nondecreasing
%C Column 4 of A203330
%H R. H. Hardin, <a href="/A203326/b203326.txt">Table of n, a(n) for n = 1..20</a>
%e Some solutions for n=5
%e ..1..1..0..2....1..1..0..0....2..2..1..0....0..1..2..1....1..0..2..0
%e ..1..2..2..0....1..0..2..2....0..1..2..2....0..1..1..2....1..0..1..2
%e ..0..1..2..2....2..0..1..2....0..2..1..2....1..0..2..1....1..0..1..2
%e ..0..1..2..2....0..1..2..2....1..1..1..2....2..0..0..2....1..2..1..1
%e ..1..2..1..2....0..2..1..2....2..0..1..2....0..2..2..1....0..2..1..2
%K nonn
%O 1,1
%A _R. H. Hardin_ Dec 31 2011
|