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 A223754 Number of 3X(n+1) 0..3 arrays with every row least squares fitting to a positive slope straight line and every column least squares fitting to a zero or positive slope straight line, with a single point array taken as having zero slope 1
 120, 4800, 330642, 12302880, 604821816, 22711440400, 1014307917869, 38610169465600, 1658751854189100, 63838034769804960, 2687820628008631473, 104236704958533831680, 4335856635102731433604, 169076593322020829272240 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 3 of A223751 LINKS R. H. Hardin, Table of n, a(n) for n = 1..17 EXAMPLE Some solutions for n=3 ..0..0..0..3....0..0..1..0....0..0..0..1....0..0..1..0....0..0..0..1 ..0..3..1..1....1..0..0..2....0..3..0..3....0..2..3..0....1..0..0..3 ..0..2..0..3....2..1..1..3....1..3..3..3....0..1..1..1....1..0..1..2 CROSSREFS Sequence in context: A001807 A111155 A283344 * A174686 A140907 A072419 Adjacent sequences: A223751 A223752 A223753 * A223755 A223756 A223757 KEYWORD nonn AUTHOR R. H. Hardin Mar 27 2013 STATUS approved

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Last modified December 7 12:56 EST 2023. Contains 367656 sequences. (Running on oeis4.)