A245844 Number of length n 0..n 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, 1500089, 3364343, 31536051, 77010521, 782091916, 2060257730, 22485413587, 63440153687, 739249776945, 2220625119939, 27479009460738, 87449057712710

Offset

1,3

Comments

Diagonal of A245851

Links

R. H. Hardin, Table of n, a(n) for n = 1..41

Example

Some solutions for n=10
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..1....0....1....1....1....1....0....0....1....1....1....1....1....0....1....0
..1....0....2....1....2....0....1....1....2....2....0....0....2....1....2....1
..0....1....0....0....1....2....2....2....0....3....1....2....0....1....3....1
..2....2....1....1....3....1....1....3....0....0....0....1....0....0....1....2
..1....2....0....0....0....2....0....2....0....0....0....1....2....0....1....2
..2....1....2....2....2....0....0....0....0....3....1....2....1....1....3....1
..0....0....1....0....2....1....1....1....2....2....0....0....1....1....2....1
..1....0....1....1....1....1....1....1....1....1....1....1....1....0....1....0
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0

Crossrefs

Sequence in context: A245848 A245849 A245850 * A373849 A083849 A326512

Adjacent sequences: A245841 A245842 A245843 * A245845 A245846 A245847

Keyword

nonn

Author

R. H. Hardin, Aug 04 2014

Status

approved