%I #5 Mar 27 2013 03:49:00
%S 24,200,4800,74504,1918704,37050508,946850616,20113935465,
%T 509453736192,11257895221560,282315340773312,6383772791781791,
%U 158807147100328272,3640670785754169744,90021689826455389824,2082728356589903943286
%N Number of nX3 0..3 arrays with every row least squares fitting to a positive slope straight line and every column least squares fitting to a zero or positive slope straight line, with a single point array taken as having zero slope
%C Column 2 of A223751
%H R. H. Hardin, <a href="/A223748/b223748.txt">Table of n, a(n) for n = 1..30</a>
%e Some solutions for n=3
%e ..0..1..3....1..2..2....2..0..3....1..2..2....2..0..3....0..2..1....2..3..3
%e ..2..1..3....1..1..2....2..1..3....2..0..3....2..0..3....1..3..3....2..0..3
%e ..2..3..3....1..3..3....2..3..3....2..2..3....2..1..3....0..3..1....2..3..3
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 27 2013