A245845 Number of length n 0..2 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, 14, 16, 65, 77, 356, 448, 2279, 2959, 15572, 20762, 111641, 151205, 824798, 1131376, 6239399, 8640935, 48063692, 67082670, 375759443, 527790821, 2973583640, 4198991910, 23773324409, 33722329677, 191725694792, 273021483730

Offset

1,3

Comments

Column 2 of A245851

Links

R. H. Hardin, Table of n, a(n) for n = 1..121

Example

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

Crossrefs

Sequence in context: A106181 A098887 A259097 * A097438 A205482 A055879

Adjacent sequences: A245842 A245843 A245844 * A245846 A245847 A245848

Keyword

nonn

Author

R. H. Hardin, Aug 04 2014

Status

approved