A245847 Number of length n 0..4 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, 568, 918, 6115, 11063, 84095, 167139, 1377562, 2919818, 25322454, 55877190, 500009859, 1130615111, 10314022021, 23685168139, 218801537756, 507728746032, 4731965243042, 11064419359152, 103808357373783

Offset: 1

Author

R. H. Hardin, Aug 04 2014

Keywords

• nonn

Comments

Column 4 of A245851

Examples

			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....1....1....1....0....1....1....1
..1....0....0....1....2....1....2....0....0....0....0....2....0....1....2....2
..1....1....2....2....2....1....1....2....0....2....0....3....1....0....0....3
..2....0....0....1....3....0....3....2....1....1....1....3....2....2....1....2
..1....2....2....1....0....0....1....3....1....0....1....1....2....1....2....0
..0....2....1....2....0....0....2....0....2....0....1....4....2....3....3....2
..1....0....1....3....3....0....1....3....2....2....1....2....2....1....2....3
..0....1....2....2....2....1....2....2....1....0....0....3....1....2....2....2
..1....0....1....0....2....1....2....0....0....1....0....2....0....1....0....2
..1....0....0....1....1....0....1....1....0....1....1....1....0....0....1....1
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..123