login
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
1

%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