A222959 T(n,k)=Number of nXk 0..1 arrays with every row and column least squares fitting to a zero slope straight line, with a single point array taken as having zero slope.

2, 2, 2, 4, 2, 4, 4, 4, 4, 4, 8, 4, 16, 4, 8, 8, 8, 16, 16, 8, 8, 20, 8, 64, 16, 64, 8, 20, 18, 20, 64, 64, 64, 64, 20, 18, 52, 18, 400, 64, 512, 64, 400, 18, 52, 48, 52, 324, 400, 512, 512, 400, 324, 52, 48, 152, 48, 2704, 324, 8000, 512, 8000, 324, 2704, 48, 152, 138, 152

Offset: 1

Author

R. H. Hardin Mar 10 2013

Keywords

• nonn
• tabl

Comments

Table starts

...2...2.....4.....4.......8.......8.........20........18...........52

...2...2.....4.....4.......8.......8.........20........18...........52

...4...4....16....16......64......64........400.......324.........2704

...4...4....16....16......64......64........400.......324.........2704

...8...8....64....64.....512.....512.......8000......5832.......140608

...8...8....64....64.....512.....512.......8000......5832.......140608

..20..20...400...400....8000....8000.....323600....215892.....14843920

..18..18...324...324....5832....5832.....215892....144930......9546228

..52..52..2704..2704..140608..140608...14843920...9546228...1808243216

..48..48..2304..2304..110592..110592....9734400...6503472...1052045568

.152.152.23104.23104.3511808.3511808.1138729280.685380312.407454282560

.138.138.19044.19044.2628072.2628072..631004724.419107674

Examples

			Some solutions for n=4 k=4
..0..0..0..0....0..0..0..0....1..1..1..1....1..1..1..1....0..1..1..0
..0..1..1..0....1..1..1..1....0..1..1..0....1..1..1..1....1..1..1..1
..0..1..1..0....1..1..1..1....0..1..1..0....1..1..1..1....1..1..1..1
..0..0..0..0....0..0..0..0....1..1..1..1....1..1..1..1....0..1..1..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..199

Crossrefs

Column 2 is A222955, column 4 is A222956, column 6 is A222957