A223045 Number of nX2 0..2 arrays with every row and column least squares fitting to a nonnegative slope straight line, with a single point array taken as having zero slope

6, 20, 120, 536, 3378, 17362, 108534, 597935, 3721248, 21071310, 130311096, 750104699, 4613728254, 26815009916, 164248964064, 960731599727, 5866192543680, 34466973845193, 209936262159534, 1237576209559222

Offset

1,1

Comments

Column 2 of A223048

Links

R. H. Hardin, Table of n, a(n) for n = 1..31

Example

Some solutions for n=3
..1..1....0..0....0..1....1..2....0..1....0..0....0..0....0..0....2..2....1..1
..0..2....0..1....0..1....0..1....2..2....0..1....0..2....0..1....2..2....2..2
..2..2....1..2....2..2....1..2....0..2....2..2....0..1....0..1....2..2....1..1

Crossrefs

Sequence in context: A117998 A267855 A099840 * A245855 A074012 A074013

Adjacent sequences: A223042 A223043 A223044 * A223046 A223047 A223048

Keyword

nonn

Author

R. H. Hardin Mar 12 2013

Status

approved