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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 0
128, 130, 1744, 1788, 30512, 31192, 1123232, 998326, 70377392, 67719592, 7247150528, 7292561038, 965453254352 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 20 13:07 EDT 2020. Contains 337264 sequences. (Running on oeis4.)