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

1,1

Comments

Column 1 of A223747

Links

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

Example

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

Crossrefs

Sequence in context: A100066 A170832 A232281 * A117783 A121445 A327798

Adjacent sequences: A223740 A223741 A223742 * A223744 A223745 A223746

Keyword

nonn

Author

R. H. Hardin Mar 27 2013

Status

approved