A245846 Number of length n 0..3 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, 77, 101, 551, 861, 5433, 9055, 61725, 107467, 758905, 1355573, 9770843, 17740093, 129645671, 238154311, 1758252307, 3258924505, 24252921697, 45276251763, 339138059251, 636861131319, 4796151474225, 9051310984485

Offset

1,3

Comments

Column 3 of A245851

Links

R. H. Hardin, Table of n, a(n) for n = 1..117

Example

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

Crossrefs

Sequence in context: A056471 A164904 A188164 * A245847 A245848 A245849

Adjacent sequences: A245843 A245844 A245845 * A245847 A245848 A245849

Keyword

nonn

Author

R. H. Hardin, Aug 04 2014

Status

approved