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A222854 Number of n X n 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 0
2, 6, 108, 2262, 452400, 113936464, 391515458264, 1332606996955912 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A222862

LINKS

Table of n, a(n) for n=1..8.

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A284262 A287935 A181036 * A059088 A216151 A057771

Adjacent sequences:  A222851 A222852 A222853 * A222855 A222856 A222857

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 07 2013

STATUS

approved

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Last modified July 30 19:15 EDT 2021. Contains 346359 sequences. (Running on oeis4.)