A222855 Number of n X 1 0..1 arrays with every row and column least squares fitting to a nonnegative slope straight line, with a single point array taken as having zero slope.

2, 3, 6, 10, 20, 36, 74, 137, 282, 536, 1100, 2117, 4332, 8406, 17144, 33464, 68058, 133398, 270700, 532230, 1078080, 2124714, 4297434, 8485470, 17141764, 33898436, 68409684, 135450295, 273114928, 541320762, 1090693986, 2163654766, 4356757738

Offset

1,1

Comments

Column 1 of A222862.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

All solutions for n=3
..0....0....1....1....0....0
..0....1....0....1....0....1
..1....0....1....1....0....1

Crossrefs

Cf. A222862.

Sequence in context: A007562 A345973 A329702 * A171682 A008929 A066062

Adjacent sequences: A222852 A222853 A222854 * A222856 A222857 A222858

Keyword

nonn

Author

R. H. Hardin, Mar 07 2013

Status

approved