A223591 Number of nX7 0..1 arrays with every row having the same least squares slope fit to a straight line, and every column the same least squares slope fit to a straight line, with a single point array taken as having zero slope

128, 130, 1744, 1788, 30512, 31192, 1123232, 998326, 70377392, 67719592, 7247150528, 7292561038, 965453254352

Offset

1,1

Comments

Column 7 of A223592

Links

Table of n, a(n) for n=1..13.

Example

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

Crossrefs

Sequence in context: A187353 A248773 A217847 * A097758 A257446 A130445

Adjacent sequences: A223588 A223589 A223590 * A223592 A223593 A223594

Keyword

nonn

Author

R. H. Hardin Mar 22 2013

Status

approved