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

27, 45, 309, 739, 8355, 25953, 347991, 1229117, 18018549, 67909529, 1046096523, 4096787051, 65040649449, 260964444937, 4226066166411, 17238820837359, 283096808484339, 1168749542908559, 19394826830524971, 80809800289872123

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