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A223019 Number of nX3 0..2 arrays with every row having the same least squares slope fit to a straight line, and every column the same least squares slope fit to a straight line, with a single point array taken as having zero slope 1
27, 45, 309, 739, 8355, 25953, 347991, 1229117, 18018549, 67909529, 1046096523, 4096787051, 65040649449, 260964444937, 4226066166411, 17238820837359, 283096808484339, 1168749542908559, 19394826830524971, 80809800289872123 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A223022

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..33

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A043148 A043928 A275250 * A059658 A241407 A153260

Adjacent sequences:  A223016 A223017 A223018 * A223020 A223021 A223022

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 11 2013

STATUS

approved

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Last modified May 23 11:20 EDT 2019. Contains 323514 sequences. (Running on oeis4.)