A202577 - OEIS

%I #5 Mar 31 2012 12:36:49

%S 20,616,15688,343827,6776376,123282439,2108296388,34358272840,

%T 538646901836,8180787550288,121042309430814,1752140900283557,

%U 24896080430892382,348195329411678801,4803948400755983252

%N Number of nX3 0..3 arrays with the row and column sums nondecreasing

%C Column 3 of A202581

%H R. H. Hardin, <a href="/A202577/b202577.txt">Table of n, a(n) for n = 1..18</a>

%e Some solutions for n=3

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 21 2011