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A223161 Number of n X 2 0..3 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. 1
10, 50, 500, 3886, 40380, 359428, 3723640, 34904103, 359369380, 3443215781, 35239493220, 341632309893, 3481114925880, 33990585784253, 345233367469580, 3387095713649185, 34318646356187030, 337838214180679732 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A223165.

LINKS

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

EXAMPLE

Some solutions for n=3

..0..0....1..1....0..0....2..3....0..1....2..2....0..0....1..1....1..1....0..1

..2..3....2..3....0..3....0..0....0..3....0..3....0..1....3..3....2..2....0..1

..2..3....1..2....0..1....3..3....0..2....2..3....0..2....3..3....2..2....0..1

CROSSREFS

Cf. A223165.

Sequence in context: A000450 A124872 A240534 * A216156 A072296 A143558

Adjacent sequences: A223158 A223159 A223160 * A223162 A223163 A223164

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 16 2013

STATUS

approved

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Last modified November 28 08:48 EST 2022. Contains 358407 sequences. (Running on oeis4.)