A222956 Number of nX3 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

4, 4, 16, 16, 64, 64, 400, 324, 2704, 2304, 23104, 19044, 222784, 183184, 2310400, 1937664, 25441936, 21641104, 292820544, 252301456, 3481944064, 3038655376, 42543187600, 37528988176, 531580977216, 473355008064, 6768530689600

Offset

1,1

Comments

Column 3 of A222959

Links

R. H. Hardin, Table of n, a(n) for n = 1..75

Example

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

Crossrefs

Sequence in context: A056450 A164906 A213173 * A170833 A231940 A129884

Adjacent sequences: A222953 A222954 A222955 * A222957 A222958 A222959

Keyword

nonn

Author

R. H. Hardin Mar 10 2013

Status

approved