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 A222895 Number of n X n 0..2 arrays with successive rows and columns fitting to straight lines with strictly increasing slope, with a single point array taken as having zero slope 0
 3, 31, 621, 230803, 129912903 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A222896 LINKS Table of n, a(n) for n=1..5. EXAMPLE Some solutions for n=4 ..1..0..1..0....2..1..1..0....2..0..0..0....2..1..1..0....2..1..1..0 ..0..0..1..0....0..2..0..0....0..2..0..1....0..2..0..1....1..0..2..1 ..0..1..1..1....1..1..1..2....0..1..2..1....0..1..0..1....0..1..1..1 ..0..0..2..1....0..0..1..2....0..1..1..2....0..2..2..2....0..0..1..2 CROSSREFS Sequence in context: A266487 A229258 A319896 * A105293 A104841 A092552 Adjacent sequences: A222892 A222893 A222894 * A222896 A222897 A222898 KEYWORD nonn AUTHOR R. H. Hardin Mar 08 2013 STATUS approved

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Last modified September 22 21:28 EDT 2023. Contains 365531 sequences. (Running on oeis4.)