A223743 Number of nX1 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.

3, 3, 9, 9, 39, 43, 195, 243, 1209, 1539, 8007, 10557, 56277, 75595, 409431, 558117, 3061119, 4218077, 23357223, 32466849, 181185495, 253624579, 1424453499, 2005655781, 11325017397, 16024596491, 90896159565, 129159081787

Offset: 1

Author

R. H. Hardin Mar 27 2013

Keywords

• nonn

Comments

Column 1 of A223747

Examples

			Some solutions for n=6
..2....0....1....1....2....0....2....2....1....0....2....0....1....1....1....0
..1....1....1....1....1....1....2....0....0....2....1....2....2....0....2....1
..0....2....0....2....0....2....0....1....2....2....1....1....1....2....2....1
..0....2....2....0....2....0....0....1....1....2....1....2....2....2....0....1
..1....1....2....0....2....0....2....0....2....2....1....0....0....0....1....1
..2....0....0....2....1....1....2....2....0....0....2....1....2....1....2....0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210