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 A222954 Number of n X n 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. 0
 2, 2, 16, 16, 512, 512, 323600, 144930, 1808243216, 615667968 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS EXAMPLE Some solutions for n=4 ..0..1..1..0....1..1..1..1....0..0..0..0....1..0..0..1....0..1..1..0 ..1..1..1..1....1..0..0..1....1..1..1..1....0..1..1..0....1..0..0..1 ..1..1..1..1....1..0..0..1....1..1..1..1....0..1..1..0....1..0..0..1 ..0..1..1..0....1..1..1..1....0..0..0..0....1..0..0..1....0..1..1..0 CROSSREFS Main diagonal of A222959. Sequence in context: A016740 A193145 A133922 * A240033 A088139 A152556 Adjacent sequences:  A222951 A222952 A222953 * A222955 A222956 A222957 KEYWORD nonn,more AUTHOR R. H. Hardin, Mar 10 2013 STATUS approved

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Last modified May 18 15:25 EDT 2021. Contains 343995 sequences. (Running on oeis4.)