A223819 Number of nX1 0..3 arrays with every row and column least squares fitting to a zero slope straight line, with a single point array taken as having zero slope

4, 4, 16, 22, 112, 172, 1064, 1742, 11664, 19976, 138640, 243802, 1732272, 3104312, 22419608, 40745940, 297918608, 547354320, 4040882352, 7488584886, 55716851136, 103984450924, 778639744064, 1461701983398, 11004152490272, 20759785009832

Offset

1,1

Comments

Column 1 of A223824

Links

R. H. Hardin, Table of n, a(n) for n = 1..199

Example

Some solutions for n=4
..0....0....2....3....3....2....1....2....1....3....2....1....1....2....3....0
..0....3....2....1....0....0....0....1....2....3....3....0....1....0....2....3
..0....0....2....1....3....0....0....1....2....3....3....3....1....3....2....3
..0....1....2....3....2....2....1....2....1....3....2....0....1....1....3....0

Crossrefs

Sequence in context: A137725 A240035 A321677 * A082649 A156232 A053441

Adjacent sequences: A223816 A223817 A223818 * A223820 A223821 A223822

Keyword

nonn

Author

R. H. Hardin Mar 27 2013

Status

approved