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A223749 Number of nX4 0..3 arrays with every row least squares fitting to a positive slope straight line and every column least squares fitting to a zero or positive slope straight line, with a single point array taken as having zero slope 0
117, 2826, 330642, 21965901, 2810374281, 252313355237, 32063498387856, 3229688051024065, 404471979822899781 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A223751

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

Some solutions for n=3

..0..0..2..0....0..0..2..0....0..0..2..0....0..0..2..2....0..0..0..2

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

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

CROSSREFS

Sequence in context: A233051 A278774 A219990 * A218416 A027511 A203626

Adjacent sequences: A223746 A223747 A223748 * A223750 A223751 A223752

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 27 2013

STATUS

approved

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Last modified February 2 16:39 EST 2023. Contains 360023 sequences. (Running on oeis4.)