A223754 Number of 3X(n+1) 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

120, 4800, 330642, 12302880, 604821816, 22711440400, 1014307917869, 38610169465600, 1658751854189100, 63838034769804960, 2687820628008631473, 104236704958533831680, 4335856635102731433604, 169076593322020829272240

Offset

1,1

Comments

Row 3 of A223751

Links

R. H. Hardin, Table of n, a(n) for n = 1..17

Example

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

Crossrefs

Sequence in context: A001807 A111155 A283344 * A174686 A140907 A072419

Adjacent sequences: A223751 A223752 A223753 * A223755 A223756 A223757

Keyword

nonn

Author

R. H. Hardin Mar 27 2013

Status

approved