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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
2
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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 12 2013
STATUS
approved