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 A223747 T(n,k)=Number of nXk 0..2 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 5
 3, 3, 3, 9, 3, 9, 9, 9, 9, 9, 39, 9, 81, 9, 39, 43, 39, 81, 81, 39, 43, 195, 43, 1521, 81, 1521, 43, 195, 243, 195, 1849, 1521, 1521, 1849, 195, 243, 1209, 243, 38025, 1849, 144495, 1849, 38025, 243, 1209, 1539, 1209, 59049, 38025, 162583, 162583, 38025, 59049 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts .....3.....3........9.......9.........39.......43.........195......243 .....3.....3........9.......9.........39.......43.........195......243 .....9.....9.......81......81.......1521.....1849.......38025....59049 .....9.....9.......81......81.......1521.....1849.......38025....59049 ....39....39.....1521....1521.....144495...162583....21793395.30730023 ....43....43.....1849....1849.....162583...169219....22836827.28688507 ...195...195....38025...38025...21793395.22836827.26606105175 ...243...243....59049...59049...30730023.28688507 ..1209..1209..1461681.1461681.6934356117 ..1539..1539..2368521.2368521 ..8007..8007.64112049 .10557.10557 LINKS R. H. Hardin, Table of n, a(n) for n = 1..97 EXAMPLE Some solutions for n=3 k=4 ..0..0..0..0....1..0..0..1....0..0..0..0....2..2..2..2....2..2..2..2 ..1..1..1..1....0..2..2..0....1..2..2..1....2..1..1..2....2..0..0..2 ..0..0..0..0....1..0..0..1....0..0..0..0....2..2..2..2....2..2..2..2 CROSSREFS Column 2 equals column 1 and column 4 equals column 3 Sequence in context: A180637 A362376 A201539 * A161332 A217547 A285583 Adjacent sequences: A223744 A223745 A223746 * A223748 A223749 A223750 KEYWORD nonn,tabl AUTHOR R. H. Hardin Mar 27 2013 STATUS approved

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Last modified July 14 22:45 EDT 2024. Contains 374323 sequences. (Running on oeis4.)