A245850 Number of length n 0..7 arrays with new values introduced in order from both ends, and least squares fitting to a straight line with slope zero, with a single point taken as having zero slope.

1, 1, 2, 2, 5, 5, 15, 17, 78, 102, 569, 919, 6143, 11171, 86082, 175170, 1500088, 3364342, 31535985, 77009999, 782070479, 2060080119, 22479986118, 63401859508, 738236317300, 2214267997760, 27326431358171, 86567146969997

Offset

1,3

Comments

Column 7 of A245851.

Links

R. H. Hardin, Table of n, a(n) for n = 1..40

Example

Some solutions for n=12
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..1....0....0....0....1....0....1....1....1....1....1....1....1....0....1....1
..0....0....1....1....0....1....2....2....1....2....2....1....0....0....2....0
..2....0....2....2....2....2....2....0....2....0....3....2....1....1....2....2
..2....0....3....2....1....1....1....0....3....1....2....3....0....2....1....3
..1....1....1....3....0....3....1....0....0....1....1....4....2....2....3....1
..3....1....1....3....0....3....2....2....2....0....1....4....2....1....3....0
..0....0....1....2....1....1....3....0....0....2....2....3....0....0....1....2
..0....0....0....2....2....2....2....1....2....1....3....2....1....1....2....0
..2....0....2....1....0....1....1....1....2....1....2....1....0....1....2....2
..1....0....1....0....1....0....1....1....1....1....1....1....1....0....1....1
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0

Crossrefs

Cf. A245851.

Sequence in context: A245847 A245848 A245849 * A245844 A083849 A326512

Adjacent sequences: A245847 A245848 A245849 * A245851 A245852 A245853

Keyword

nonn

Author

R. H. Hardin, Aug 04 2014

Status

approved