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A222856 Number of nX2 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, 18, 41, 123, 310, 957, 2530, 7848, 21618, 67131, 188835, 585276, 1670602, 5161503, 14880389, 45808419, 133004125, 408229851, 1191329175, 3646802121, 10684589006, 32632896159, 95903053435, 292350907470, 861289976308 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A222862

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..63

EXAMPLE

Some solutions for n=3

..1..1....0..0....0..0....0..0....0..0....0..0....0..1....1..1....0..1....0..1

..0..0....0..0....1..1....0..0....0..0....0..1....0..1....0..1....0..0....0..0

..1..1....1..1....0..1....0..1....0..0....0..0....1..1....1..1....0..1....1..1

CROSSREFS

Sequence in context: A081150 A216813 A181037 * A007990 A197050 A121188

Adjacent sequences:  A222853 A222854 A222855 * A222857 A222858 A222859

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 07 2013

STATUS

approved

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Last modified December 12 15:11 EST 2019. Contains 329960 sequences. (Running on oeis4.)