|
%I #7 Mar 27 2013 03:24:09
%S 9,9,81,81,1521,1849,38025,59049,1461681,2368521,64112049,111450249,
%T 3167100729,5714604025,167633743761,311494585689,9370449532161,
%U 17792173577929,545559866271729,1054096283988801,32828183598395025
%N Number of nX3 0..2 arrays with every row and column least squares fitting to a zero slope straight line, with a single point array taken as having zero slope
%C Column 3 of A223747
%H R. H. Hardin, <a href="/A223744/b223744.txt">Table of n, a(n) for n = 1..33</a>
%e Some solutions for n=6
%e ..1..2..1....2..2..2....1..2..1....1..2..1....1..1..1....2..1..2....0..2..0
%e ..0..2..0....2..1..2....1..0..1....1..0..1....1..1..1....0..2..0....2..2..2
%e ..1..1..1....0..0..0....2..0..2....1..1..1....1..2..1....0..0..0....0..2..0
%e ..1..1..1....0..2..0....0..0..0....1..1..1....1..0..1....0..0..0....0..2..0
%e ..0..2..0....2..2..2....0..0..0....1..0..1....1..0..1....0..2..0....2..2..2
%e ..1..2..1....2..1..2....2..2..2....1..2..1....1..2..1....2..1..2....0..2..0
%K nonn
%O 1,1
%A _R. H. Hardin_ Mar 27 2013
| 