A222950 Number of nX2 0..3 arrays with no adjacent rows or columns having the same least squares slope fit to a straight line, with a single point array taken as having zero slope

0, 212, 2256, 36302, 455904, 6471572, 84040156, 1156716696, 15178933676, 206025068636, 2712435820392, 36611998287306, 483144415956072, 6500119089674696, 85910716717515264, 1153267214849914148

Offset

1,2

Comments

Column 2 of A222953

Links

R. H. Hardin, Table of n, a(n) for n = 1..24

Example

Some solutions for n=3
..3..3....2..2....2..1....2..3....3..1....1..1....2..1....1..0....2..0....3..0
..2..1....1..2....3..3....3..1....3..3....1..2....2..2....0..0....2..2....3..1
..0..3....1..3....1..2....1..0....0..1....1..3....2..0....0..2....2..1....3..3

Crossrefs

Sequence in context: A114880 A348831 A200433 * A356358 A232671 A082828

Adjacent sequences: A222947 A222948 A222949 * A222951 A222952 A222953

Keyword

nonn

Author

R. H. Hardin Mar 10 2013

Status

approved